+NATIONAL HURRICANE CENTERTROPICAL CYCLONE REPORTHURRICANE HARVEY(AL092017)17 August – 1 September 2017
Eric S. Blake and David A. Zelinsky
National Hurricane Center
9 May 2018 1

NASA TERRA MODIS INFRARED IMAGE OF HARVEY AT 0419 UTC 26 AUGUST 2017 JUST AFTER LANDFALL AS A
CATEGORY 4 HURRICANE IN TEXAS. IMAGE COURTESY OF UW/CIMSS.

Harvey started as a typical weak August tropical storm that affected the Lesser
Antilles and dissipated over the central Caribbean Sea. However, after re-forming over the
Bay of Campeche, Harvey rapidly intensified into a category 4 hurricane (on the SaffirSimpson Hurricane Wind Scale) before making landfall along the middle Texas coast. The
storm then stalled, with its center over or near the Texas coast for four days, dropping
historic amounts of rainfall of more than 60 inches over southeastern Texas. These rainscaused catastrophic flooding, and Harvey is the second-most costly hurricane in U.S.
history, after accounting for inflation, behind only Katrina (2005). At least 68 people diedfrom the direct effects of the storm in Texas, the largest number of direct deaths from a
tropical cyclone in that state since 1919.
1 Original report date 23 January. Updated Montgomery county damage, tornado totals, corrected sometypos, and added a picture of Nederland, Texas, rain gauge location.

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Hurricane Harvey
17 AUGUST – 1 SEPTEMBER 2017

SYNOPTIC HISTORY
The wave that spawned Harvey moved off the west coast of Africa on 12 August with alarge convective mass that had mostly dissipated by late the next day. Convection increased
near the wave axis on 15 August, likely due to the passage of a convectively coupled Kelvin wave
early that day (Fig. 1). A low pressure center formed early on 16 August, but easterly shear
initially prevented any organization of the associated convection. The shear relaxed overnight,
allowing deep convection to build near the center, and a tropical depression formed around 0600
UTC 17 August about 440 n mi east of Barbados. The depression became a tropical storm 12 hlater. The “best track” chart of Harvey’s path is given in Fig. 2, with the wind and pressure histories
shown in Figs. 3 and 4, respectively. The best track positions and intensities are listed in Table
1 2.
Harvey moved quickly westward, south of a western Atlantic ridge, reaching an initial peakintensity of 40 kt early on 18 August. The storm’s center passed over Barbados at 1000 UTC
that day and St. Vincent five hours later, although most of the strong winds occurred away fromthose islands to the north of the center. Increasing northerly wind shear caused Harvey togradually weaken back to a depression early on 19 August and to degenerate into a tropical wave
by 1800 UTC that day over the central Caribbean Sea.
The remnants of Harvey moved rapidly to the west and west-northwest for the next coupleof days, staying convectively active while they moved over the Yucatan Peninsula on 22 August.
A low pressure area formed late that day in association with a short-lived burst of deep convection.
The low moved west-northwestward into the Bay of Campeche early on 23 August and, shortly
after 0600 UTC, more persistent deep convection increased near the low. By 1200 UTC, an Air
Force Reserve reconnaissance aircraft found that the circulation of the low had become betterdefined, indicating that Harvey had regenerated into a tropical depression when its center was
located about 150 n mi west of Progreso, Mexico.
Initially, the depression was poorly organized with a large radius-of-maximum winds(RMW). This structure did not last for long as a smaller RMW formed, possibly due toconcentrated deep convection near the center. Harvey began to rapidly intensify late on 23
August in an environment of light shear, very warm water and high mid-level moisture. The storm
turned northward, steered around the western edge of the distant subtropical ridge, and the track
gradually bent toward the northwest during the next day or two. The cyclone’s rate ofintensification increased early on 24 August as a large mass of deep convection formed over thecenter, and an eye was noted on reconnaissance observations by 1200 UTC that day. Harvey
2

A digital record of the complete best track, including wind radii, can be found on line at
ftp://ftp.nhc.noaa.gov/atcf. Data for the current year’s storms are located in the btk directory, while previous
years’ data are located in the archive directory.

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became a hurricane later on 24 August, and by that night a well-defined eye appeared in infrared
satellite pictures. The hurricane reached category 3 status by midday on 25 August while itapproached the middle Texas coast and intensified into a category 4 hurricane by 0000 UTC 26
August. Harvey’s center made landfall on the northern end of San Jose Island about 5 n mi eastof Rockport, Texas at 0300 UTC that day. Sustained winds of 115 kt and a minimum centralpressure of 937 mb are estimated for that landfall. The hurricane then made a second landfall on
the Texas mainland 3 h later, slightly weaker due to land interaction, with 105 kt winds and an
estimated central pressure of 948 mb southeast of Refugio on the northeast coast of Copano Baywest of Holiday Beach. Harvey rapidly weakened over land to a tropical storm within 12 h after
landfall and maintained a 35-kt intensity for the next day or so, aided by the sustaining effects ofthe southeastern portion of its circulation remaining over water.
The steady northwestward motion of the cyclone stopped as Harvey became embedded
in light steering currents between one mid-tropospheric high over the Four Corners region andanother high over the northern Gulf of Mexico. The storm made a slow loop late on 26 August
into 27 August, and drifted eastward or southeastward for the next few days. Although the center
passed well south of the Houston Metro and Golden Triangle (southeastern Texas between
Beaumont, Port Arthur and Orange) areas, torrential rains fell in these locations near a stationary
front on the north and east side of Harvey (see Figs. 12-15).
The storm center moved back offshore around 0300 UTC 28 August over Matagorda Bay,
its winds slightly re-strengthening with deep convection reforming near and north of the center.
However, the vertical wind shear was too strong for much intensification, and Harvey reached a
final peak intensity of 45 kt late on 29 August. By that time, the storm turned to the north-northeast
due to a strengthening ridge over the western Atlantic, its center never having moved more than
60 n mi offshore of the Texas Coast. Extremely heavy rains, however, continued on the northand northwest side of the tropical cyclone, most concentrated then near the Beaumont-Port Arthurarea. Harvey made its final landfall in southwestern Louisiana at 0800 UTC 30 August near
Cameron with 40-kt sustained winds. Thereafter, the cyclone slowly weakened over land,
becoming a tropical depression late on 30 August. Harvey then moved northeastward over thesouthern United States while producing heavy rainfall, and it transformed into an extratropical
cyclone by 0600 UTC 1 September over the Tennessee Valley. The cyclone dissipated overnorthern Kentucky late the next day.

METEOROLOGICAL STATISTICS
Observations in Harvey (Figs. 3 and 4) include subjective satellite-based Dvorak
technique intensity estimates from the Tropical Analysis and Forecast Branch (TAFB) and theSatellite Analysis Branch (SAB), and objective Advanced Dvorak Technique (ADT) estimates fromthe Cooperative Institute for Meteorological Satellite Studies/University of Wisconsin-Madison.
Observations also include flight-level, stepped frequency microwave radiometer (SFMR), anddropwindsonde observations from 21 flights of the 53rd Weather Reconnaissance Squadron of
the U. S. Air Force Reserve Command and the NOAA Hurricane Hunters. Data and imagery fromNOAA polar-orbiting satellites including the Advanced Microwave Sounding Unit (AMSU), theHurricane Harvey

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NASA Global Precipitation Mission (GPM), the European Space Agency’s Advanced
Scatterometer (ASCAT), and Defense Meteorological Satellite Program (DMSP) satellites, among
others, were also useful in constructing the best track of Harvey.
Ship reports of winds of tropical storm force associated with Harvey are given in Table 2,
and selected surface observations from land stations and data buoys are given in Table 3.

Winds and Pressure
Harvey’s maximum winds of 115 kt occurred during a several hour period concluding with
its first Texas landfall. That intensity was based on a blend of peak SFMR measurements of 113
kt near 2122 UTC 25 August and maximum observed 700-mb flight-level winds of 129 kt at 2037
UTC and 2330 UTC 25 August. Both of those 700-mb winds support a surface wind of about 115
kt using a typical flight-level wind to surface wind reduction. Another SFMR measurement of 113
kt at 0419 UTC 26 August is thought to be unreliable due to shoaling. The highest observed
sustained winds on land were 96 kt near Aransas Pass, with the highest observed gust being 126
kt near Rockport, Texas (Table 3). It should be noted, however, that the northeastern quadrantof the hurricane came ashore in an unpopulated and unmonitored area near San Jose Island andMatagorda Island, including Aransas National Wildlife Refuge, and the maximum winds were
probably not sampled by any anemometer. An instrument near the entrance of Copano Bay failed
before the highest winds arrived at that location.
The minimum pressure of Harvey is estimated to be 937 mb, based on a dropsondemeasurement of 938 mb with 10 kt of surface wind at 0215 UTC 26 August. The lowest observedpressure on land was 940.8 mb reported by a storm chaser in Rockport at 0331 UTC 26 August.
Another storm chaser reported a pressure of 932.8 mb in Rockport at about the same time, but
this observation is questionable because other pressure readings in the area were several mb
higher. It is also possible that this pressure was observed in an eyewall mesovortex, which would
not be representative of the overall circulation.

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Storm Surge3
The combined effect of the surge and tide produced maximum inundation levels of 6 to
10 ft above ground level to the north and east of Harvey’s center landfalls in Texas in the backbays between Port Aransas and Matagorda, including Copano Bay, Aransas Bay, San Antonio
Bay, and Matagorda Bay. Fig. 5 provides an analysis of maximum coastal inundation heights
along the coasts of Texas and Louisiana from Harvey. The highest inundations (8 to 10 ft above
ground level) likely occurred along the western shores of San Antonio Bay and adjacent Hynes
Bay. The highest measured water level by a tide gauge was 6.7 ft above Mean Higher High Water(MHHW) at a Texas Coastal Ocean Observing Network (TCOON) site at Port Lavaca. Other
notable TCOON tide gauge observations include 5.5 ft MHHW at Seadrift, 5.3 ft MHHW at Port
Aransas, and 4.8 ft MHHW at the Aransas National Wildlife Refuge. Fig. 6 shows water levels
relative to MHHW measured at tide gauges along the coasts of Texas and Louisiana.
Data from United States Geological Survey (USGS) storm tide pressure sensors and highwater mark surveys from the back bays between Port Aransas and Matagorda provide evidence
of inundations higher than those suggested solely by the National Ocean Service (NOS) or
TCOON tide gauges. A sensor installed in Austwell, Texas, along the shore of Hynes Bay
recorded a wave-filtered water level of 9.49 ft above the North American Vertical Datum of 1988
(NAVD88), which converts to 8.7 ft MHHW. In addition, a sensor installed in Port Lavaca recorded
a water level of 8.82 ft NAVD88 (8.1 ft MHHW), while a sensor located in the upper reaches ofCaranchua Bay measured a water level of 9.17 ft NAVD88 (8.4 ft MHHW). Various high watermark surveys conducted by the USGS and the National Weather Service (NWS) between
Austwell and the Aransas National Wildlife Refuge suggested water levels as high as 11 to 12 ft
MHHW, but these estimates likely contain the effects of wave runup and thus may be too high torepresent actual inundation. The USGS storm tide sensor data, with considerations of sampling
gaps, suggest that the highest inundations from Harvey were 8 to 10 ft above ground level.
Copano Bay, where Harvey made its second Texas landfall, also had significant storm
surge flooding of 4 to 7 ft above ground level. A TCOON gauge near the entrance to Copano Bay
recorded a maximum water level of 4.0 ft MHHW while a nearby USGS storm tide sensor
measured a wave-filtered water level of 5.79 ft NAVD88 (5.1 ft MHHW). A survey conducted by
the Corpus Christi NWS office also measured up to 7 ft of inundation above ground level at
Holiday Beach on the northeastern side of Copano Bay.
Similar coastal flooding of 4 to 7 ft above ground level occurred in locations south of Port
Aransas to the north entrance of the Padre Island National Seashore. In addition to theaforementioned Port Aransas gauge, which measured 5.3 ft MHHW, the TCOON gauge at
3 Several terms are used to describe water levels due to a storm. Storm surge is defined as the abnormalrise of water generated by a storm, over and above the predicted astronomical tide, and is expressed interms of height above normal tide levels. Because storm surge represents the deviation from normal waterlevels, it is not referenced to a vertical datum. Storm tide is defined as the water level due to the
combination of storm surge and the astronomical tide, and is expressed in terms of height above a vertical
datum, i.e. the North American Vertical Datum of 1988 (NAVD88) or Mean Lower Low Water (MLLW).
Inundation is the total water level that occurs on normally dry ground as a result of the storm tide, and isexpressed in terms of height above ground level. At the coast, normally dry land is roughly defined as areas
higher than the normal high tide line, or Mean Higher High Water (MHHW).

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Packery Channel measured a water level of 4.7 ft MHHW, and the USGS surveyed a high watermark of 6.4 ft above ground level near Port Aransas. Along the Gulf of Mexico side of the barrier
island, a water level of 3.5 ft MHHW was measured at the Bob Hall Pier. Due to offshore winds
on the west side of Harvey, less flooding (generally 1 to 3 ft above ground level) occurred in
Corpus Christi Bay. A tide gauge at the USS Lexington in Corpus Christi measured a water levelof 1.0 ft above MHHW. Less than 3 ft of inundation also occurred to the south in areas adjacentto Laguna Madre, including Padre Island.
Onshore winds to the east of Harvey’s Texas landfall locations likely produced storm surge
inundations of 4 to 7 ft above ground level along the barrier island from Port Aransas toMatagorda, however that area is unpopulated with no tide gauge observations. To the north andeast, tide gauge observations indicate that water levels of 2 to 4 ft above ground level occurredfrom Matagorda through the upper Texas coast eastward to the central Louisiana coast due tostorm surge. For example, the TCOON tide gauge at High Island recorded a peak water level of
4.1 ft MHHW while the gauge at San Luis pass measured a water level of 3.3 ft MHHW. In
Louisiana, an NOS gauge at the Freshwater Canal Locks recorded a peak water level of 3.2 ft
MHHW.
It must be noted that several tide gauges, particularly those in upper Galveston Bay near
Houston and in Sabine Lake near Beaumont and Port Arthur, recorded peak water levels thatwere significantly affected by excessive rainfall runoff from Harvey’s historic heavy rains. The
most extreme cases were from two TCOON gauges on the east side of Houston: a station in
Manchester measured a peak water level of 10.5 ft MHHW and a gauge at Lynchburg Landing
recorded a peak water level of 7.3 ft MHHW. While these water levels are representative of thetype of inundation that occurred in parts of the Houston area, the high values reported by thesegauges were largely caused by excessive rainfall runoff and not storm surge.

Rainfall and Flooding

Harvey was the most significant tropical cyclone rainfall event in United States history,
both in scope and peak rainfall amounts, since reliable rainfall records began around the 1880s.
The highest storm total rainfall report from Harvey was 60.58 inches near Nederland, Texas (Fig.
7), with another report of 60.54 inches from near Groves, Texas. Both of these values (and fromfive other stations) exceed the previously accepted United States tropical cyclone storm total
rainfall record of 52.00 inches at Kanalohuluhulu Ranger Station, Hawaii, in August of 1950 from
Hurricane Hiki. A map of the storm-total rainfall associated with Harvey (or its post-tropical phaseover the Ohio Valley) is given in Fig. 8.
For the continental United States, the previous tropical cyclone rainfall record was 48.00
inches in Medina, Texas from Tropical Storm Amelia in 1978. It is remarkable that during Harvey,
eighteen values over 48 inches were recorded (Fig. 9) across southeastern Texas, with 36 to 48
inches recorded in the Houston metro area. These rains caused catastrophic flooding in Harrisand Galveston counties, with 9 out of the 19 official river gauges in Harris County (which includes
the city of Houston) recording all-time high flood stages. Table 3 shows selected heavy rain totals,

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and a full listing of rainfall reports can be found in a supplementary data file at:https://www.nhc.noaa.gov/data/tcr/supplemental/harvey_rain.xlsx.
Due to the severe limitations of measuring rainfall of this magnitude (e.g. many standard
rain gauges filled up to a ~12 inch maximum and were unable to be emptied due the extreme rain
rates), it is useful to look at the peak rain totals in other ways The multi-radar, multi-sensor
quantitative precipitation estimation radar estimates (Fig. 10, for more details see:https://www.nssl.noaa.gov/about/events/review2015/science/files/Zhang_NSSLReview2015_MRMS-Hydro.pdf)
were as high as 65-70 inches in southeastern Texas. Interestingly, there were few rainfall reports
near the center of the radar-estimated maximum during Harvey in the vicinity of Port Arthur andthe Lower Neches Wildlife Management Area (Fig. 10), and these radar estimates represent thehighest rainfall that could have occurred (outside of the actual measurements).
While the peak rainfall amounts were exceptional over Texas, the areal extent of heavy
rainfall is truly overwhelming, literally and figuratively. A comparison of historic United States
tropical cyclone rainfall events is shown in Figs. 11a and b, with Harvey being compared to Allison(2001) and Beulah (1967). Large sections of southeastern Texas received 3 ft or more of rainfall
in Harvey, whereas only very small portions of the Houston metro area had those totals in Allison.
Beulah had one of the largest 10 inch or greater rain shields on record, similar to Harvey’s. For
any total above 15 inches, however, Harvey’s area(s) are considerably larger. In fact, NOAA
recently completed an analysis of annual exceedance probabilities for southeastern Texas (Fig.
12) after Harvey, with a large portion of that area experiencing a flood with less than a 1-in-1000(0.1%) chance of occurring in any given year (e.g., a 1000-year or greater flood). Whileestablished records of this nature are not kept, given the exceptional exceedance probabilities, it
is unlikely the United States has ever seen such a sizable area of excessive tropical cyclone
rainfall totals as it did from Harvey.
The meteorological situation that caused Harvey to produce these extreme rains deserves
additional explanation. While Harvey was very slow moving over Texas, not all drifting cyclones
produce such torrential rain totals, and it is notable that the heaviest rainfall fell outside of the coreof the cyclone. Harvey moved into a somewhat baroclinic environment over Texas, with slightly
cooler and drier air over the southern United States behind a weak stationary front (Fig. 13). The
weak front was situated across the Houston metro area from 26-27 August, enhancing surface
convergence and lift within the very warm and humid air on the eastern side of Harvey, leading toseveral episodes of heavy rain. Upper-level divergence was also occurring near the front, further
contributing to large and intense rain bands. The rain rates observed in these bands were
exceptional, with 6.8 inches of rain in just one hour documented in southeastern Houston fromextremely heavy rain bands training over the same location. The front hardly moved from 27-28
August (Figs. 14, 15), leading to the extreme rainfall totals in the Houston metro area since themain inflow band originated over the very warm waters of the northwestern Gulf of Mexico, which
provided multiple influxes of warm and humid air. It should be noted that while the magnitude ofthis event was unprecedented, the synoptic situation was not, and previously has been associatedwith other tropical cyclone flood events near the coast.
By late on 28 August, the front was in the vicinity of the Beaumont/Port Arthur area, andHarvey’s center had moved offshore. The cyclone had begun to lose some tropical characteristics
with drier air wrapping around the core, but it still was advecting warm and moist air over thefrontal boundary along the Texas/Louisiana coasts, producing abundant isentropic lift. The

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heaviest rainfall was occurring in a deformation zone on the north or northwest side of the cyclone,near the stationary front. While the rainfall was not as heavy as the 26 August event, 2-3 inchesof rain per hour were still occurring in areas of Houston. The heaviest rain shifted eastward into
Jefferson County on 28-30 August, which was located in the deformation zone and near thestationary front (Fig. 16), leading to the absolute rainfall maxima in that area.
Harvey also produced heavy rain over Louisiana, with a peak amount of 23.71 inches
recorded west of Vinton. Radar data, however, suggests an estimate of about 40 inches for a
maximum value, which is considered more representative of peak rainfall in that state since there
were few observations over extreme southwestern Louisiana (e.g. Fig. 10). Lesser totals were
measured as Harvey moved farther into the southern United States and Tennessee Valley on 31
August - 1 September, although there was a local maximum of about a foot of rain reported in
Tennessee. These rains caused some significant flooding in Tennessee, especially in Robertson
County.

Tornadoes

Harvey was a prolific tornado producer. There were 52 tornadoes preliminarily reported
during Harvey (Fig. 17), about half of which occurred near and south of the Houston metro area.
Over 150 tornado warnings were issued during the event. Tornadoes were also noted inLouisiana, Mississippi, Alabama and Tennessee as the cyclone moved near or over those states.
Fortunately, almost all of the tornadoes were relatively weak, of EF-0 and EF-1 intensity, withgenerally minor damage, few injuries and no deaths attributed to them.

CASUALTY AND DAMAGE STATISTICS
Harvey is responsible for at least 68 direct deaths 4 in the United States, all in Texas. Over
half of the deaths (36) were in Harris County in the Houston metro area. A county-by-county
listing of the direct deaths is available in Table 4. All but three of the deaths were from freshwater
flooding, and none of the deaths can be linked to the storm surge, which is quite remarkable fora category 4 hurricane landfall. Still, Harvey is the deadliest U.S. hurricane in terms of direct
deaths since Sandy (2012) and is the deadliest hurricane to hit Texas since 1919. About 35
additional deaths are ascribed to indirect causes, such as electrocution, motor-vehicle crashes
and isolation from necessary medical services. Four people were reported injured by a tornado
north of Reform, Alabama.

4 Deaths occurring as a direct result of the forces of the tropical cyclone are referred to as “direct” deaths.
These would include those persons who drowned in storm surge, rough seas, rip currents, and freshwater
floods. Direct deaths also include casualties resulting from lightning and wind-related events (e.g.,collapsing structures). Deaths occurring from such factors as heart attacks, house fires, electrocutions fromdowned power lines, vehicle accidents on wet roads, etc., are considered “indirect” deaths.

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The latest NOAA damage estimate from Harvey is $125 billion, with the 90% confidence
interval ranging from $90 to $160 billion. The mid-point of the estimate would tie Katrina (2005)
as the costliest United States tropical cyclone, which was also $125 billion (seehttps://www.ncdc.noaa.gov/billions/). However, the unadjusted costliest tropical cyclone list is not
the most relevant record to examine because of inflation and other cost increases since 2005. A
more reasonable comparison uses the Consumer Price Index (CPI)-adjusted technique, which
modifies 2005 dollars to 2017. The adjustments make Katrina’s total $161.3 billion in 2017 dollars,leading to Harvey being the 2nd costliest U.S. tropical cyclone. There is, however, still a large
uncertainty in the total damage estimate (hence the large confidence interval). This is due tomany factors, including that a majority of the residential flood loss claims are from outside the500-year flood plain, where there is low National Flood Insurance Program (NFIP) participation,with tens of thousands of claims still outstanding.
The damage caused by Harvey’s flooding was catastrophic over a large area ofsoutheastern Texas. Over 300,000 structures in that region were flooded, with up to 500,000
cars reported flooded as well (e.g., Fig. 18). About 336,000 customers lost power during thehurricane. An estimated 40,000 flood victims were evacuated to or took refuge in shelters acrossTexas or Louisiana. FEMA reported that about 30,000 water rescues were conducted during
Harvey.
The exceptional rainfall fell over some of the most densely populated areas of the U.S.
Gulf Coast. Widespread flooding of homes and businesses occurred from the Houston metroarea southward, and the floodwaters inundated major roads such as I-10, I-45, and US-59.
Record water levels were observed on Buffalo Bayou, Clear Creek, Dickinson Bayou and Cypress
Creek. Some of the hardest hit areas from flooding in the Houston metro area extended from
Humble to Lake Houston, including the neighborhoods of Northshore, Bellaeu Woods, Riviera,
Treasure Cove, Kings Lake Estates, Kings River, Kings Crown Estates, Kings River Estates,
Atascocita Shores, Atascocita West, Ramblewood, Walden Subdivisions, and along the West
Lake Houston Parkway, North Houston Ave., Thelma Road, Hamblen Road and Aqua Vista Drive.
These were just some of the hundreds of subdivisions that suffered catastrophic flooding. During
the height of the storm, controlled releases from Addicks and Barker Reservoirs were performed
to prevent catastrophic dam failures, which further flooded some of the areas above. Record
flooding along the east fork of the San Jacinto River led to flooded homes in Northwood Country
Estates and River Terrace.
Farther south, catastrophic flooding was reported in League City, Friendswood andDickinson in Galveston County, with extreme water levels leading to numerous water rescues
across these areas and downtown Houston (Fig. 19). Primary and secondary roads in the area
were inundated, including Bay Area Blvd., FM 528 and FM 518. At least 160,000 structures were
flooded in Harris and Galveston counties.
Beyond the Houston metro area, the most serious flood damage was noted farther east in
Texas over Jefferson, Orange, Hardin and Tyler counties, with about 110,000 structures (about
one-third of the total structures damaged by Harvey) in those counties flooded. Flooding induced
by widespread rainfall amounts of 40 inches resulted in several oil and gas refineries in the Golden
Triangle area (southeastern Texas between Beaumont, Port Arthur and Orange) going offline fordays, and consequently gas prices in the United States spiked to their highest levels in two years.
Record water levels were seen on Pine Island Bayou, the Lower Neches River and Cow Bayou.

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A bridge collapse occurred at the Highway 96 Bridge over Village Creek near Silsbee, and flood
waters inundated parts of I-10 in Rose City, Vidor and near the city of Orange. Historic flooding
was also reported in many cities across these counties, including Port Arthur, Lumberton, Warren,
Groves, Bevil Oaks, Sour Lake, Hamshire, Fannett, China, Silsbee, Lakeview, Mauriceville andnortheastern Beaumont.
Near the initial landfall location in Texas, wind damage was extreme in Aransas County,
Nueces County, Refugio County and the eastern part of San Patricio County. Approximately
15,000 homes were destroyed in these areas, with another 25,000 damaged, and extensive tree
damage was noted. Generally, the damage was most severe in the areas adjacent to Aransas
Bay and Copano Bay, with the city of Rockport hit particularly hard. Coastal areas of the counties
above and Calhoun County were inundated with storm surge, and many marinas reported serious
damage or destruction of boats, docks and piers. This includes State Highway 361 which wasinundated along the entire stretch of Mustang Island. The surge also damaged or destroyed many
coastal structures in Port Aransas, Holiday Beach, Copano Village, Lamar, Seadrift, North Padre
Island and Mustang Island. Erosion from surge near the Packery Channel caused an interruption
to the primary water supply to Port Aransas for six days. Corpus Christi was spared the worst of
the hurricane’s effects, with widespread but mostly minor damage reported. At the peak, roughly
220,000 customers lost power.
In Fort Bend County, major flooding occurred with both the Brazos and San Bernard Rivers
experiencing record floods. Major-to-record flooding occurred along the Brazos River from
Richmond to Rosharon. Significant home flooding occurred in areas of Simonton, Richmond,
Rosenburg, and Thompsons. Nearly 200,000 people were evacuated due to levee concerns andrestrictions. Major-to-record flooding also occurred on the San Bernard River at both East
Bernard and Boling, with the hardest hit area being Tierra Grande. At least 8,500 homes in thiscounty were damaged by Harvey.
In Brazoria County, the Brazos and San Bernard Rivers experienced record water levels,
which caused widespread floods across the county. The hardest hit communities were in Baileys
Prairie, Richard and West Columbia. Widespread major flooding on the Brazos River and Oyster
Creek led to numerous roads and homes flooding in Columbia Lakes, Mallard Lakes, Great Lakes,
Riverside Estates and the Bar X Ranch subdivisions, as well as homes on CR 39. Flooding
damaged the bridge over Cow Creek at CR 25, making it impassable. Major flooding also
occurred along the San Bernard River at Sweeny with widespread inundation of the west
floodplain. The Phillips 66 refinery took on water near Little Linville Bayou. Hanson Riverside
Park was inundated, and water overtopped the Phillips Terminal, halting all vessel traffic. Highflows from the Brazos and San Bernard Rivers caused navigation problems for several weeks.
Over 9,000 homes experienced flood damage from the storm.
In Wharton County, widespread catastrophic flooding occurred from both the Colorado
and San Bernard Rivers, causing Highway 59 to close between Hungerford and El Campo. The
flooding inundated areas of Wharton, with hundreds of homes and businesses under water inmany communities including Hobben Oaks, Bear Bottom, Elm Grove, River Valley and Pecan
Valley. Other areas such as Glenflora, Peach Acres and the Orchard were hard hit. Major-torecord flooding also occurred on the San Bernard River at both East Bernard and Boling, with thehardest hits areas being El Lobo and New Gulf. Major lowland flooding occurred with many

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homes (including some on the second-story) and businesses being inundated, and the cotton
crop was decimated. An estimated 2,000 homes were damaged or destroyed in the county.
Major lowland flooding occurred in Matagorda County along the Tres Palacios River.
Many roadways were under water, and homes in the El Dorado Country, Oak Grove, and Tres
Palacios Oaks subdivisions flooded. Major flooding also occurred on the Colorado River at Bay
City as levees were overtopped by 2 ft of water. High flows from the Colorado and Tres Palacios
Rivers impacted river navigation for several weeks. Roughly 2,900 homes were damaged in the
county.
In San Jacinto County, major lowland flooding occurred on the Trinity River near Goodrichwith damage and debris noted near the boat ramp and channel in proximity to the river gauge.
Major flooding occurred upstream near Lake Livingston, with roads and many homes south of thelake being inundated. About 3,300 homes were damaged in the county.
In Montgomery County, widespread catastrophic flooding occurred along the San Jacinto
River and its tributaries, and along Lake, Spring, Caney and Peach Creeks. Record poolelevations were observed at Lake Conroe, leading to a record water release which exacerbatedflooding downstream. The flooding resulted in over 300 road closures and all major thoroughfares
including SH 242, SH 105, US 59 and I-45. County first responders completed over 6000 highwater rescues. The hardest hit subdivisions included River Oaks, Mccade Park and Estates,
Woodloch, Whispering Oaks, Chateau Woods, Benders Landing, Del Lago, Walden, Spring
Forest, Clear Creek Forest, Shadow Bay, Timber Lakes, Timber Ridge and Fox Run. Over 4,100
houses were damaged or destroyed by the flooding.
Major-to-record flooding occurred in Liberty County along the Trinity River with numerous
roads inundated including FM 787. Many homes and subdivisions were either cut off orinundated, specifically north of the city of Liberty and in the Grenada Lakes Estates subdivision.
Significant damage occurred along the banks of the river due to high flows and several utility lines
were severed due to the loss of poles in the vicinity of the Romayor gauge. Record river levels
were also observed on the east fork of the San Jacinto River causing significant flooding in
Cleveland, Williams and Plum Grove. High flows caused significant scouring of the state 105(business) road; other roads were washed out as well, with bridge washouts or closures observedin many parts of the county. At least 1,000 homes were damaged in the county.
In Chambers County, record floods over the lowlands occurred along the Trinity River.
Cedar Bayou was out of its banks in many locations, with significant flooding observed in Baytown.
Numerous roads and homes were inundated across the county, including extensive flooding in
the Milam Bend subdivision. High flows from the Trinity River impacted the navigation community
for several weeks. An estimated 3,000 homes were damaged, and numerous businesses had
significant damage.
In Jasper and Newton counties, an estimated 20 to 40 inches of rain fell across the area.
This rainfall lead to major flooding, with over 4,000 homes flooded in Jasper County and about
2,000 in Newton County. The hardest hit areas were Kirbyville, Buna, Weiss Bluff, Trout Creek,
Call and along the Sabine River. River gauges on the Neches and Sabine rivers had levels up to
their second highest crests on record, and Big Cow Creek at Newton recorded its highest on
record.

Hurricane Harvey

12

In Fayette County, a widespread area of 25 to 30 inches of rain produced major flooding
along the Colorado River and produced the third highest crest ever at La Grange. Much of thecity of La Grange below Waters Street was flooded. There were over 400 flooded homes andbusinesses flooded in La Grange and across the county. Two hundred of the homes sustained
major flood damage including dozens of businesses that were flooded in downtown La Grange.
Less severe flooding occurred in DeWitt County near Cuero from the Guadalupe River.
Louisiana received relatively minor damage compared to Texas. Still, roughly 2,000
homes flooded in Calcasieu, Beauregard, and Cameron Parishes, with many flooded roads andrivers noted. Many of these homes were located along the Sabine River, which recorded its
second highest crest on record at Orange. Eastern sections of Lake Charles, Chennault eastward
to Iowa and northward to Moss Bluff were hit with flooding late on 27 August.
Very heavy rain in Tennessee caused minor damage. The Memphis area had flooding
and over 19,000 customers lost power, with winds gusting to 52 kt at the airport. More significant
flooding was reported in Robertson County (Nashville area), with 13 residents in the Chestnut
Flats Apartment near the Nashville Fairgrounds evacuated due to the high water. In addition, thedowntown Nashville Goodwill Industries reported major flooding, and about 10,000 customers
were out of power at one time in that city.
Much of the damage summaries in this section came from the Post Tropical Cyclone
Reports from the Corpus Christi, San Antonio, Houston and Lake Charles NWS offices. Further
local details are available in their summaries at: http://www.weather.gov/crp/hurricane_harvey,
https://www.weather.gov/ewx/wxevent-2017harvey,
http://www.weather.gov/hgx/hurricaneharvey and https://www.weather.gov/lch/2017harvey.

FORECAST AND WARNING CRITIQUE
NHC anticipated with limited lead time Harvey's formation to the east of the Caribbean
Islands (Table 5a). NHC introduced the 5-day potential for tropical cyclone development into the
Tropical Weather Outlook (TWO) in the low category (<40%) about 4 days before genesis
occurred. It raised the probability to the medium (40-60%) category 3 days before formation, andthe 2-day probability only reached the medium category 12 h before genesis occurred. In neither
forecast time period did the probability reach the high category (>60%). The re-formation ofHarvey was well-forecast by NHC (Table 5b), with the system re-entering the outlook 78 h before
genesis occurred again with a medium chance of formation during the next 5 days. The remnantsof Harvey in the Caribbean were given a high (>60%) chance of genesis in the 2-day outlook 42
h before reformation occurred — an excellent forecast by current standards.
A verification of NHC official track forecasts for Harvey is given in Table 6a. Official
forecast track errors were much lower than the mean official errors for the previous 5-yr period,
although the OCD5 (climatology) errors were also quite low, indicating that these forecasts were“easier” than average. A homogeneous comparison of the official track errors with selectedguidance models is given in Table 6b. Generally the NHC official forecast (OFCL) beat much of
the guidance except for the consensus aids (TVCN, TVCX). Among the individual deterministicHurricane Harvey

13

models, the ECMWF (EMXI), UKMET (EGRI) and COAMPS (CTCI) models all did well at someof the forecast times, mostly centered in the middle range of the forecast period. Much of the
GFS-based guidance (GFSI, AEMI and HWFI) did not have a particularly good performance for
Harvey.
A verification of NHC official intensity forecasts for Harvey is given in Table 7a. Official
forecast intensity errors were above the mean official errors for the previous 5-yr period through48 hours, then considerably lower than average after that through 5 days. A homogeneouscomparison of the official intensity errors with selected guidance models is given in Table 7b. The
NHC intensity forecast performed better than all of the intensity model guidance at 12, 96 and120 h but was worse than all of guidance at 36 and 48 h. This unusual dichotomy appears to be
due to the cyclone weakening faster than expected over land at 36 and 48 h, but NHC correctly
forecasting Harvey to stay a weak cyclone at long range, with almost every forecast point verifying
over land. In general, the intensity model consensus (IVCN) was the best model aid, and wassuperior to any other forecast (including OFCL) from 24-48 h. The Decay-SHIPS (DSHP) andFlorida State Superensemble (FSSE) models had relatively poor performances compared to theother guidance.
Initially, the rapid intensification (RI) of Harvey after its re-formation was not wellanticipated, but most of the guidance had Harvey near hurricane intensity before landfall in Texas(Fig. 20). The next day, however, most of the historically reliable guidance aids showed Harvey
rapidly intensifying, although the guidance was still too low (Fig. 21). A NHC Special Advisory
issued at 1800 UTC 24 August, 33 h before landfall (not shown), forecast RI and verified within 5
kt of the intensity near landfall, which was an outstanding forecast.
Watches and warnings for winds associated with Harvey are given in Table 8. A Hurricane
Watch was first issued at 1500 UTC 23 August and a Hurricane Warning was first issued at 0900
UTC 24 August. These watches and warnings were issued about 48 and 36 hours, respectively,
before tropical-storm-force winds affected the Texas coast, close to the desired lead times. The
possibility of hurricane-force winds to affect the Texas coast was first mentioned in the Tropical
Weather Outlook, over 72 hours before they occurred, which is believed to be a first for a systemthat had not yet (re)formed.
The NHC began providing direct support to emergency managers on 22 August, asHarvey was re-forming over the Yucatan Peninsula and continued through 30 August, when
Harvey made its final landfall in SW Louisiana. This decision support included calls and briefings
coordinated through the FEMA Hurricane Liaison Team, embedded at the NHC. The briefings
included the states of Texas and Louisiana, FEMA Region 6 as well as Federal/State videoteleconferences. The NHC also collaborated with the affected NWS offices to ensure a consistentmessage, and NWS meteorologists provided Impact-based Decision Support Services (IDSS),
for local and state emergency management offices during this event. In addition, the NHC director
maintained direct communications with senior state emergency management officials to discuss
the evolving threat to Texas. For the first part of Harvey’s track, the NHC provided support tomany government meteorological services for areas around the Caribbean Sea, including
Barbados (which has responsibility for Dominica, St. Vincent and the Grenadines), France (forMartinque and Guadeloupe), St. Lucia, Aruba, Belize and Mexico.

Hurricane Harvey

14

At various points in time, the NWS issued storm surge warnings for portions of the Texas
coast from Port Mansfield to High Island and for portions of the Louisiana coast from Holly Beach
to Morgan City. The NWS issued storm surge watches for other portions of the Texas coast southof Port Mansfield to the mouth of the Rio Grande, east of High Island to Holly Beach, and for thecoasts of Galveston Bay and Sabine Lake. The NWS issued the initial Storm Surge Watch for
Harvey along the Texas coast from Port Mansfield to High Island at 1500 UTC 23 August (Table
9). The initial Storm Surge Warning was issued from Port Mansfield to San Luis Pass, Texas, at
0900 UTC 24 August. Water level observations indicate that at least 3 ft of inundation (which
NHC uses as an initial threshold for the storm surge watch/warning) occurred in areas within thebounds of the storm surge warning area in Texas (see Fig. 6).
The NHC’s first forecast for maximum storm surge heights (at 1500 UTC 23 August) was
4 to 6 ft above ground level within the storm surge watch area, and that forecast was graduallyraised to 6 to 12 ft above ground level within the area between the north entrance of the Padre
Island National Seashore to Sargent at 1800 UTC 24 August. Later that evening, maximum storm
surge heights were increased to 9 to 13 ft above ground level in the area from Port Aransas toPort O’Connor. The maximum observed storm surge heights of 8 to 10 ft above ground leveloccurred within that outlined region in the back bays between Port Aransas and Port O’Connor.
Before the Louisiana landfall of Harvey, the NWS issued a Storm Surge Watch from Port
Bolivar, Texas, to Morgan City, Louisiana, at 2100 UTC 28 August, and a portion of that area from
Holly Beach to Morgan City was upgraded to a Storm Surge Warning at 2100 UTC 29 August for
expected inundations of 2 to 4 ft above ground level, especially in Vermilion Bay. Although there
were no tide gauges where the highest inundation occurred, storm surge simulation hindcasts
indicate that 2 to 4 ft of inundation above ground level occurred in portions of Vermilion Bay.
The storm surge watches and warnings for Harvey were the first operational issuance of
these products for the NWS, which have been in development for the past several years. It is
hoped that this new capability, along with the storm surge inundation graphic and major outreachefforts during that time, were factors in there being no surge-related deaths from this category 4
hurricane. In addition, an NHC media pool was in full operation from 24-26 August to provide live
briefings to national and local television outlets in both English and Spanish, and an additional
200 media phone interviews were conducted. NHC was also active on social media to keep the
public informed in real-time on the latest NHC/NWS forecasts and warnings, with posts on Twitter
generating 35 million impressions and Facebook posts reaching more than 5.5 million users andcausing 2.9 million post engagements.
The rainfall forecasts for Harvey, issued by the Weather Prediction Center (WPC), were
the highest on record for any U.S. tropical cyclone event and deserve some comment. When
Harvey re-formed in the Gulf of Mexico, the initial maximum rainfall forecast was for 20” insoutheastern Texas (Fig. 22). These rainfall forecasts were gradually increased to a peak of 40”
several hours before Harvey made landfall in Texas, roughly 24-36 hours before the extreme
rains began in the Houston metro area. These totals were further raised to 50” about a day before
the center of Harvey left Texas.

Hurricane Harvey

Table 1.

15

Best track for Hurricane Harvey, 17 August – 1 September 2017.

Date/Time(UTC)

Latitude(°N)

Longitude(°W)

Pressure
(mb)

Wind
Speed
(kt)

Stage

16 / 0600

13.7

45.8

1013

25

low

16 / 1200

13.7

47.4

1010

25

"

16 / 1800

13.6

49.0

1009

25

"

17 / 0000

13.6

50.6

1010

25

"

17 / 0600

13.4

52.0

1008

25

tropical depression

17 / 1200

13.1

53.4

1008

30

"

17 / 1800

13.0

55.0

1004

35

tropical storm

18 / 0000

13.0

56.6

1003

40

"

18 / 0600

13.0

58.4

1004

40

"

18 / 1000

13.1

59.6

1004

40

"

18 / 1200

13.1

60.3

1004

40

"

18 / 1500

13.2

61.2

1004

40

"

18 / 1800

13.2

62.2

1005

35

"

19 / 0000

13.4

64.0

1005

35

"

19 / 0600

13.5

65.7

1005

35

"

19 / 1200

13.7

67.5

1006

30

tropical depression

19 / 1800

13.8

69.2

1007

30

tropical wave

20 / 0000

14.0

71.0

1007

30

"

20 / 0600

14.2

72.9

1007

30

"

20 / 1200

14.4

75.0

1006

30

"

20 / 1800

14.7

76.8

1007

30

"

21 / 0000

15.1

78.6

1007

25

"

21 / 0600

15.7

80.5

1008

25

"

21 / 1200

16.4

82.5

1008

25

"

21 / 1800

17.3

84.6

1008

25

"

22 / 0000

18.0

86.4

1008

25

"

Hurricane Harvey

16

22 / 0600

18.6

87.8

1009

25

"

22 / 1200

19.4

88.8

1010

25

"

22 / 1800

20.0

89.7

1010

25

low

23 / 0000

20.5

90.7

1009

25

"

23 / 0600

20.9

91.6

1008

25

"

23 / 1200

21.4

92.3

1006

30

tropical depression

23 / 1800

21.6

92.4

1005

35

tropical storm

24 / 0000

22.0

92.5

1003

40

"

24 / 0600

22.8

92.6

997

50

"

24 / 1200

23.7

93.1

986

60

"

24 / 1800

24.4

93.6

978

70

hurricane

25 / 0000

25.0

94.4

973

80

"

25 / 0600

25.6

95.1

966

90

"

25 / 1200

26.3

95.8

949

95

"

25 / 1800

27.1

96.3

943

105

"

26 / 0000

27.8

96.8

941

115

"

26 / 0300

28.0

96.9

937

115

"

26 / 0600

28.2

97.1

948

105

"

26 / 1200

28.7

97.3

978

65

"

26 / 1800

29.0

97.5

991

50

tropical storm

27 / 0000

29.2

97.4

995

45

"

27 / 0600

29.3

97.6

998

40

"

27 / 1200

29.1

97.5

998

35

"

27 / 1800

29.0

97.2

998

35

"

28 / 0000

28.8

96.8

997

35

"

28 / 0600

28.6

96.5

997

40

"

28 / 1200

28.5

96.2

997

40

"

28 / 1800

28.4

95.9

997

40

"

29 / 0000

28.2

95.4

996

40

"

29 / 0600

28.1

95.0

996

40

"

Hurricane Harvey

1729 / 1200

28.2

94.6

995

40

"

29 / 1800

28.5

94.2

993

45

"

30 / 0000

28.9

93.8

994

45

"

30 / 0600

29.4

93.6

990

40

"

30 / 0800

29.8

93.5

991

40

"

30 / 1200

30.1

93.4

992

40

"

30 / 1800

30.6

93.1

996

35

"

31 / 0000

31.3

92.6

998

30

tropical depression

31 / 0600

31.9

92.2

999

25

"

31 / 1200

32.5

91.7

1001

20

"

31 / 1800

33.4

90.9

1001

25

"

01 / 0000

34.1

89.6

1000

30

"

01 / 0600

34.9

88.2

1002

30

extratropical

01 / 1200

36.0

87.1

1002

25

"

01 / 1800

36.5

86.4

1004

20

"

02 / 0000

37.2

85.6

1007

20

"

02 / 0600

37.9

84.9

1009

20

"

02 / 1200

38.2

84.7

1013

15

"

02 / 1800

dissipated

18 / 1000

13.1

59.6

1004

40

landfall on the southernend of Barbados

18 / 1500

13.2

61.2

1004

40

landfall on St. Vincent

26 / 0300

28.0

96.9

937

115

minimum pressure,maximum winds andlandfall on San Jose
Island, TX

26 / 0600

28.2

97.1

948

105

landfall on the northeast
end of Copano Bay, westof Holiday Beach, TX

30 / 0800

29.8

93.5

991

40

landfall near Cameron, LA

Hurricane Harvey

Table 2.

Date/Time(UTC)
25 / 0600
25 / 0600
25 / 0600
25 / 0600
25 / 0700
25 / 0900
25 / 1100
25 / 1200
25 / 1500
26 / 0500
28 / 1200
28 / 2000
29 / 2300
30 / 0300
30 / 1100
30 / 1500

Selected ship reports with winds of at least 34 kt for Harvey.

Ship callsign
WDE958A8PQ7WBYQWDF476
A8PQ7
WLMQ
C6FN5
WNFQ
LAIG7
3FMK7
WGAX
2CWB5
WFAF
WFAF
3FNZ5
LAIG7

Latitude(°N)

Longitude
(°W)

Wind
dir/speed(kt)

Pressure
(mb)

27.0
27.4
27.6
28.0
27.3
22.1
25.9
28.0
28.5
28.9
28.3
28.1
27.7
28.3
29.9
27.5

91.7
91.9
91.8
92.7
91.8
92.0
88.6
92.7
93.3
93.2
93.0
92.7
87.6
88.5
93.9
91.7

080 / 40130 / 35
090 / 37
140 / 55
130 / 35
230 / 45020 / 35
120 / 35
140 / 42130 / 38
190 / 45
330 / 46
130 / 41
110 / 36
340 / 40
250 / 37

1006.71008.01010.11009.41008.01007.21008.11008.31012.01012.01006.81006.01013.21016.1995.3
1010.018

Hurricane Harvey

Table 3.

Selected surface observations for Harvey, 17 August – 1 September 2017.
Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

MartiniqueInternational Civil Aviation Organization (ICAO) Sites
Martinique Aimé
Césaire International
Airport (TFFF)

18/1400

29

44(14.59N 61.00W)

St. Lucia
International Civil Aviation Organization (ICAO) Sites
HewanorraInternational Airport(TLPL)

18/131823

43

18/1400

18

39

52 F

64

(13.73N 60.95W)

George F.L. Charles
Airport (TLPC)(14.02N 60.99W)

Offshore Sites
NOAA Buoys
Corpus Christi, TX(42020) G

25/1850980.6

25/1850

28/2350997

25/1930

29/2000

995.5

29/2230

25/1100

1000.2

25/1130

25/1330990.6

25/1400(26.97N 96.69W)

Freeport, TX (42019)(27.91N 95.35W)

Galveston, TX (42035)(29.23N 94.41W)

TGLO TABS Buoy J(42044)(26.19N 97.05W)

TGLO TABS Buoy K(42045)(26.22N 96.50W)

Oil Platforms

19(5 m, 10 min)35
(5 m, 10 min)38
(5 m, 10 min)27
(3.4 m, 10 min)37
(3.4 m, 10 min)

47

52

34

49

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Eugene Island 215(KEIR)

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

30/09481002.530/1230(26.19N 97.05W)

Mississippi Canyon
311a (KMDJ)

2030/0535(26.22N 96.50W)

Sustained
(kt)B

Gust
(kt)

34

41

(24.7 m)

36
(90 m)

Storm
surge
(ft)C

Storm
tide
(ft)D

3.1

4.68

Estimated
Inundation
(ft)E

Total
rain
(in)

48

United States
AlabamaInternational Civil Aviation Organization (ICAO) Sites
Lowe Army Heliport(KLOR)

4.39(31.33N 85.75W)

Mobile Downtown
Airport (KBFM)

4.73(30.63N 88.07W)

Mobile Regional
Airport (KMOB)

6.22(30.69N 88.24W)

Weatherflow Sites
Orange Beach/Mill
Point (XMLP)(30.30N 87.51W)

30/090223(5.5 m, 5 min)35

Other Sites
Ariton 4 W (ARTA1)(31.59N 85.78W)

Atmore 12 N (ATMA1)(31.17N 87.44W)

Daleville 2 W (DALA1)(31.34N 85.75W)

Sellerville 1 E (SLLA1)(31.13N 85.98W)

Semmes 5 SW
(BCDA1)(30.72N 88.30W)

5.28

4.50

5.40

4.40

8.04

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

21

Date/
time
(UTC)A

Sustained(kt)BSilverhill 3 W (FSHA1)(30.55N 87.8W)

Skipperville 3 ENE(SKPA1)

Gust
(kt)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

6.20

4.72

(31.58N 85.50W)

Arkansas
International Civil Aviation Organization (ICAO) Sites
Monticello Municipal
Airport (KLLQ)

3.20(33.64N 91.75W)

Stuttgart Municipal
Airport (KSGT)

4.31(34.60N 91.57W)

Other Sites
Beedeville 4 NE
(BDVA4)4.40(35.47N 91.05W)

FloridaInternational Civil Aviation Organization (ICAO) Sites
Bob Sikes Airport(KCEW)

5.69(30.78N 86.52W)

Destin Executive
Airport (KDTS)

4.53(30.40N 86.47W)

Pensacola
International Airport(KPNS)

7.99(30.47N 87.19W)

Other Sites
Chipley (CHPF1)(30.78N 85.48W)

Geneva 5 ESE(GNEF1)

3.55

3.57

(28.72N 81.04W)

Milton 7 ESE (MLYF1)(30.57N 86.92W)

4.18

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

22

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Storm
surge
(ft)C

Storm
tide
(ft)D

Oldsmar 2 W (TBFF1)

Estimated
Inundation
(ft)E

Total
rain
(in)

4.99

(28.05N 82.71W)

Georgia
Other Sites
Adel 7 W

3.02(31.16N 83.54W)

Donalsonville(DNVG1)

3.17(31.03N 84.89W)

KentuckyInternational Civil Aviation Organization (ICAO) Sites
Campbell Army
Airfield/Fort Campbell(KHOP)

01/072529(10 m, 2 min)

41

4.40

(36.67N 87.49W)

Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) Sites
Auburn 0.3 SW(KY-LG-4)

8.55(36.86N 86.72W)

Auburn 2.6 SSW(KY-LG-5)

8.76(36.83N 86.74W)

Bowling Green 1.6 SW(KY-WR-26)

8.23(36.98N 86.46W)

Guthrie 0.8 WNW(KY-WR-28)

7.80(36.65N 87.18W)

Hodgenville 0.1 SSW(KY-AL-17)

6.89(37.57N 85.74W)

Russellville 1.3 NNE(KY-LG-3)

8.02(36.86N 86.89W)

Scottsville 4.9 NE(KY-AL-11)(36.88N 86.17W)

7.65

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

23

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Smiths Grove 0.3 SE(KY-WR-26)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

8.19

(37.05N 86.20W)

Valley Station 1.6
NNE (KY-JF-21)

6.52(38.13N 85.85W)

Other Sites
Alvaton (ALVK2)

10.68(36.90N 86.38W)

Bowling Green(BWGK2)11.22(37.00N 86.43W)

Finney (BRRK2)

7.58(36.90N 86.13W)

Louisiana
International Civil Aviation Organization (ICAO) Sites
Abbeville/Chris Crusta
Memorial Airport(KIYA)

30/1035

1001

30/2055

30/1055

1006.630/1955

30/1159

1007.830/142230/0805

992.9

30/0735

30/1015994.2

30/2035

30/1333

998.6

26/202025(10 m, 2 min)34

(29.98N 92.08W)

Belle Chasse Naval
Air Station (KNBG)(29.82N 90.03W)

Boothville (KBVE)(29.33N 89.40W)

Cameron (KCVW)(29.78N 93.30W)

De Quincy Industrial
Air Park (K5R8)(30.44N 93.47W)

Fort Polk (KPOE)(31.04N 93.19W)

Galliano (KGAO)(29.44N 90.26W)

30/1855

26(10 m, 2 min)31
(10 m, 2 min)30
(10 m, 2 min)22
(10 m, 2 min)25
(10 m, 2 min)24
(10 m, 2 min)

36

42

0.46

42

34

36

35

15.04

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Lafayette Regional
Airport (KLFT)

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

30/10541001

30/2148

30/0905

993.9

30/0932

30/1053

1001.730/2100

30/10081005.830/1551(30.21N 91.98W)

Lake Charles Regional
Airport (KLCH)(30.13N 93.23W)

New Iberia/Acadiana
Regional Airport(KARA)

24

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

Sustained
(kt)B

Gust
(kt)

26

36

7.90

39

14.52

35

9.12

49

5.33

(10 m, 2 min)25
(10 m, 2 min)24
(10 m, 2 min)(30.03N 91.88W)

New Orleans
Lakefront Airport(KNEW)

35(10 m, 2 min)(30.04N 90.03W)

Port Fourchon (KXPY)
Sulphur/Southland
Field Airport (KUXL)

30/191530/0145

1001.3

28/1235(30.13N 93.38W)

26(10 m, 2 min)22
(10 m, 2 min)

41

34

Louisiana State University Coastal Studies Institute Sites
South Pelto Block(SPLL1)30/1700(29.20N 89.43W)

34(10 m, 8 min)41

National Ocean Service (NOS) Sites
Amerada Pass(AMRL1 / 8764227)

30/09421003.2

29/081230/09481003.530/1206(29.45N 91.34W)

Berwick (TESL1 /8764044)(29.67N 91.24W)

18
(11m)

25
(12.5m)

25

3.09

33

2.40

1.5

3.56

3.2

44

2.94

2.8

42

3.12

2.8

Bulk Terminal(8767961)

3.74

2.9

(30.19N 93.30W)

Calcasieu Pass
(CAPL1 / 8768094)

30/0748992.0

28/0554

30/09481002.530/1230(29.77N 93.34W)

Eugene Island(8764314)(29.37N 91.38W)

34(12.3m)35

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Freshwater Canal
Locks (FRWL1 /8766072)

25

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

30/0930

999.6

30/091230/08481006.730/1542

30/0942

994.3

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation(ft)ESustained
(kt)B

Gust
(kt)

31

40

3.99

3.2

34

1.22

1.3

3.73

3.6

1.28

1.3

(19.5m)

Total
rain
(in)

(29.55N 92.31W)

Grand Isle (GISL1 /8761724)(29.26N 89.96W)

Lake Charles (LCLL1 /8767816)23(9.3m)(30.22N 93.22W)

Port Fourchon, Belle
Pass (8762075)(29.11N 90.20W)

United States Geological Survey Sites
Bayou Grand Caillou(29.38N 90.72W)

Grand Isle
(29.27N 89.95W)

Lafitte(29.48N 90.01W)

1.8 H

3.01

1.8 H

3.05

1.6 H

2.65

1.5 H

2.81

2.5 H

3.49

United States Army Corps of Engineers Sites
Houma Navigation
Canal(29.39N 90.73W)

Mandeville(30.37N,90.09W)

Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) Sites
Goldonna 1.5 N(LA-NT-5)

12.76(32.04N 92.91W)

Iowa 0.9 ESE(LA-CC-3)

16.66(30.23N 93.00W)

Iowa 9.7 NNW(LA-CC-9)(30.37N 93.07W)

17.44

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

26

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Natchitoches 4.8
WNW (LA-NT-3)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

12.82

(31.79N 93.17W)

Noble 1.8 ESE(LA-SN-7)

13.10(31.68N93.32W)

Pleasant Hill 10.2 SE(LA-SN-3)

15.05(31.70N 93.41W)

Ragley 5 SE
(LA-BG-2)

16.16(30.47N 93.16W)

Sulphur 2.2 E(LA-CC-6)

13.23(30.23N 93.32W)

Weatherflow Sites
Cameron (XCAM)

30/1250(29.78N 93.29W)

Dulac (XDUL)(30.04N 90.02W)

Kenner Pontchartrain
Causeway (XPTN)

30/0804

1003.830/1639

30/2007(30.20N 90.12W)

Mandeville (XMVL)(30.36N 90.09W)

New Orleans
Lakefront (XLKF)

30/1854

30/1926(29.34N 90.73W)

Venice East Bay –Tower (XEBT)

30/1717(29.06N 89.30W)

Waggaman Jefferson
Parish (XJEF)

30/1817(29.94N 90.23W)

36(10.4 m, 1 min)27
(10.4 m, 1 min)33
(12.5 m, 1 min)30
(10.4 m, 1 min)28
(10.4 m, 1 min)29
(15.2 m, 5 min)22
(10.4m , 1 min)

43

36

37

35

49

40

35

Remote Automated Weather Station (RAWS) Sites
Hackberry (HAKL1)(29.89N 93.40W)

30/124927

42

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Lacassine(30.00N 92.89W)

Press.
(mb)

27

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

30/2056

27

38

Natchitoches (NATL1)(31.29N 93.11W)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

13.04

Other Sites
Bell City 13 SW(BELL1)

22.04(29.97N 93.09W)

Grand Chenier 9 ESE(GCHL1)

15.98(29.73N 92.82W)

Hackberry 8 SSW(HCKL1)

20.71(29.88N 93.42W)

Lake Arthur (LWRL1)(30.07N 92.68W)

Lake Charles (LCHL1)(30.25N 93.22W)

Leesville (LEEL1)(31.13N 93.25W)

Moss Bluff (MBFL1)(30.30N 93.22W)

Moss Bluff (MBLL1)(30.30N 93.20W)

Old Town Bay 6 NE
(OTBL1)

13.30

17.28

16.60

18.97

20.81

22.19

(30.28N 93.13W)

Vinton 5 W (NBFL1)(30.18N 93.63W)

23.71

Mississippi
International Civil Aviation Organization (ICAO) Sites
Keesler Air Force
Base (KBIX)(30.40N 88.92W)

3.69

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

28

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

M. Graham Clark
Downtown Airport(KPLK)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

4.58

(30.46N 88.53W)

Natchez-Adams
County Airport (KHEZ)

4.63(31.61N 91.30W)

Weatherflow Sites
Gulfport (XGPT)(30.36N 89.11W)

Gulfport/Ship Island(XSHI)(30.23N 88.98W)

30/192130/185432(10.4 m, 1 min)28
(11.9 m, 5 min)

35

39

Other Sites
Booneville (BOOM6)(34.67N 88.57W)

Gautier 6 NNW(SHCM6)

3.87

8.06

(30.45N 88.66W)

Gloster (GLOM6)(31.20N 91.02W)

Holcut (HCTM6)(34.73N 88.30W)

Independence 1 W(INDM6)

3.67

3.69

4.77

(34.70N 89.82W)

Necaise 1 N (NNHM6)(30.62N 89.41W)

New Albany (NABM6)(34.47N 89.00W)

North Carolina
International Civil Aviation Organization (ICAO) Sites

4.55

4.76

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

29

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Storm
surge
(ft)C

Storm
tide
(ft)D

Fayetteville Regional
Airport (KFAY)

Estimated
Inundation
(ft)E

Total
rain
(in)

3.02

(34.99N 78.88W)

Other Sites
Barber 3 S (BBRN7)

3.34(35.68N 80.61W)

Charlotte (MYSN7)

3.65(35.46N 80.81W)

Charlotte 12 N
(GILN7)3.36(35.41N 80.85W)

Clayton (CYNN7)

4.31(35.64N 78.46W)

Davidson 8 SW
(CWAN7)3.27(35.43N 80.96W)

Goldsboro 2 N(GOLN7)

3.66(35.42N 77.99W

Huntersville (COKN7)

4.18(35.42N 80.90W)

Shallote 7 NE
(NATN7)3.18(34.05N 78.29W)

Tennessee
International Civil Aviation Organization (ICAO) Sites
Memphis International
Airport (KMEM)(35.04N 89.98W)

31/223832(10 m, 2 min)

52

4.06

Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) Sites
Adams 2.9 WSW(TN-RB-18)

8.73(36.57N 87.06W)

Cedar Hill 2.6 N(TN-RB-16)(36.59N 87.00W)

10.67

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

30

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Cedar Hill 4.4 NNE(TN-RB-38)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

9.45

(36.61N 86.98W)

Clarksville 14.4 WSW(TN-MT-73)

8.67(36.46N 87.57W)

Finger 4.1 ENE(TN-MN-3)

8.67(35.38N 88.55W)

Greenbrier 1.4 N(TN-RB-15)

10.93(36.44N 86.80W)

Nashville 4.1 SSW(TN-DV-152)

18.20(36.11N 86.81W)

Pleasant View 2.8
ESE (TN-RB-35)

9.18(36.38N 86.99W)

Sommerville 1.3 E(TN-FY-5)

8.63(35.24N 89.33W)

Springfield 2.9 NNW(TN-RB-6)

10.17(36.54N 86.90W)

Springfield 4.4 SSW(TN-RB-31)

9.30(36.44N 86.98W

Other Sites
Henderson 1 N(HENT1)

11.04(35.45N 88.68W)

Texas
ICAO Sites
Alice International
Airport (KALI)

26/0653

1000.726/0853

28/1545

1000.329/1953

26/0153969.8

25/2202(27.74N 98.03W)

Angleton/Brazoria
County Airport (KLBX)(29.12N 95.47W)

Aransas County
Airport (KRKP)(28.09N 97.04W)

29(10 m, 2 min)29
(10 m, 2 min)44
(10 m, 2 min)

41

0.33

41

18.49

60

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Austin BergstromInternational Airport(KAUS)

31

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

27/0753

1003.627/0302

27/07511005.727/1729

28/2355

999.0

28/2355

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

Sustained
(kt)B

Gust
(kt)

39

47

10.07

39

7.97

(10 m, 2 min)(30.18N 97.68W)

Austin/Camp Mabry(30.32N 97.77W)

Bay City Municipal
Airport (KBYY)(28.97N 95.86W)

Beeville Municipal
Airport (KBEA)

26/0015(28.36N 97.79W)

Brazos 451 Oil
Platform (KBQX)

29/0155997.3

26/0635

27/0953

1008.926/1823(28.49N 95.72W)

Burnet Municipal
Airport (KBMQ)(30.74N 98.23W)

Calhoun County
Airport (KPKV)

26/0058(28.65N 96.68W)

Cleveland Municipal
Airport (K6R3 )30/14151004.130/1615

28/14101006.427/221025/2351994.5

25/2251

28/0435

1001.7

26/1115

27/08151008.2

26/2315

29/1535

1000.729/2355(30.35N 95.01W)

College
Station/Easterwood
Field (KCLL)

20(10 m, 2 min)31
(10 m, 2 min)30
(10 m, 2 min)46
(24.7 m, 2 min)23
(10 m, 2 min)34
(10 m, 2 min)17
(10 m, 2 min)26
(10 m, 2 min)

40

38

61

34

43

47

25.76

37

15.74

55

1.46

(30.58N 96.37W)

Corpus Christi
International Airport(KCRP)

36(10 m, 2 min)(27.77N 97.50W)

Eagle Lake Airport(KELA )
(29.60N 96.32W)

Fredericksburg (KT82)(30.24N 98.91W)

Galveston Scholes
Field (KGLS)(29.27N 94.87W)

25(10 m, 2 min)27
(10 m, 2 min)39
(10 m, 2 min)

36

35

0.73

49

22.87

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Georgetown (KGTU)(30.69N 97.69W)

Giddings (KGYB)(30.17N 96.98W)

Gonzales (KT20)(29.52N 97.46W)

Hondo Municipal
Airport (KHDO)

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

27/1340

1009.2

27/1340

26/2335

1001.927/0455

26/1715996.2

26/1715

27/08511005.827/1559

28/1335

1002.728/2155

28/13151002.429/1853

28/1335

1002

26/0615

28/1435

1003.426/1807

29/1650

1003.3

26/1750

26/1615

1001.826/1802(29.36N 99.16W)

Houston Executive
Airport (KTME)
29.81N 95.90W)

Houston Hobby Airport(KHOU)(29.65N 95.28W)

Houston Sw Airport(KAXH)(29.51N 95.48W)

Houston/Bush
Intercontinental Airport(KIAH)

32

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

Sustained
(kt)B

Gust
(kt)

24

35

4.59

38

15.77

45

13.46

(10 m, 2 min)26
(10 m, 2 min)30
(10 m, 2 min)33
(10 m, 2 min)29
(10 m, 2 min)29
(10 m, 2 min)26
(10 m, 2 min)31
(10 m, 2 min)

44

40

42

37.01

37

41

31.26

(29.97N 95.35W)

Houston/Ellington
Field (KEFD)(29.62N 95.17W)

La Grange/Fayette
Regional Airport(K3T5)

27(10 m, 2 min)20
(10 m, 2 min)

36

35

18.98

59

3.95

77

0

42

1.93

(29.91N 96.95W)

Mustang Beach
Airport (KRAS)

25/1955(27.81N 97.09W)

Naval Air Station
Corpus Christi (KNGP)

986.1

25/2149

999.0

25/1956(27.69N 97.29W)

Naval Air Station
Kingsville (KNQI)(27.51N 97.81W)

26/005647(10 m, 2 min)54
(10 m, 2 min)31
(10 m, 2 min)

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

New Braunfels
Municipal Airport

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

26/2251

1000.827/0025(29.70N 98.05W)

Nueces County Airport(KRBO)

26/0315(27.78N 97.69W)

Orange County Airport(KORG)

30/0925994.2

30/0855

26/06531000

26/1420

28/13201002.7

26/1430

27/0955

1002.926/1715

25/1253

1001.925/1553

27/0730

1002.7

26/1258

27/0756

1001.3

26/1652

28/0255

1002.4

26/1335

27/0751

1001.826/1744

27/0753

1001.426/1802

26/22561002

27/0132(30.07N 93.80W)

Palacios Municipal
Airport (KPSX)(28.72N 96.25W)

Pearland/Clover Field(KLVJ)(29.52N 95.24W)

Pleasanton (KPEZ)(28.95N 98.52W)

Port Isabel Arpt (KPIL)(26.15N 97.23W)

Port San Antonio(KSKF)(29.38N 98.58W)

Randolph Air Force
Base (KRND)(29.54N 98.28W)

Robert Wells Airport(K66R)(29.64N 96.51W)

San Antonio
International Airport(KSAT)

33

Sustained
(kt)B

Gust
(kt)

38

50

(10 m, 2 min)39
(10 m, 2 min)26
(10 m, 2 min)43
(10 m, 2 min)29
(10 m, 2 min)26
(10 m, 2 min)24
(10 m, 2 min)26
(10 m, 2 min)28
(10 m, 2 min)24
(10 m, 2 min)30
(10 m, 2 min)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

7.03

51

43

36.47

60

7.84

44

34.43

37

0.85

34

0.48

42

0.91

50

4.23

34

46

1.94

39

1.49

(29.54N 98.47W)

San Antonio Stinson
Municipal Airport(KSSF)

26(10 m, 2 min)(29.33N 98.47W)

San Marcos (KHYI)(29.90N 97.87W)

36(10 m, 2 min)48

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Southeast Texas
Regional Airport(KBPT)

34

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

30/1053996.5

30/1030

28/1320

1001.7

26/1150

26/0451998.3

26/0451

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

Sustained
(kt)B

Gust
(kt)

30

43

47.52

50

22.67

51

1.06

(10 m, 2 min)(29.95N 94.03W)

Sugarland Regional
Airport (KSGR)(29.62N 95.65W)

Victoria Regional
Airport (KVCT)(28.85N 96.92W)

38(10 m, 2 min)37
(10 m, 2 min)Coastal-Marine Automated Network (C-MAN) Sites
Port Aransas (PTAT2)(27.82N 97.05W)
Sabine Pass (SRST2)(29.68N 94.03W)

26/0200

961.7

26/022030/0800

998.3

30/0700

83(14.9 m)33
(9.1 m)108

40

National Estuarine Research Reserve System Sites
Aransas Ship Channel(MIST2)

26/0115967

25/2200

26/0200

972

26/0200(27.83N 97.05W)

Copano East (MAXT2)(27.13N 97.03W)

57 F(9.1 m)73 F(7.5 m)National Ocean Service (NOS) Sites
Bob Hall Pier (MQTT2/ 8775870)

26/0112986.3

25/2242

29/1106

1002.026/0354

28/2106

999.3

29/1900

998.3

29/1854

998.6

66

4.24

36

45

4.18

3.7

26/0930

44

53

3.19

2.5

26/1348

46

54

2.73

2.6

(27.58N 97.22W)

Eagle Point (EPTT2 /8771013)50(12.7 m)

4.72

3.5

(29.48N 94.92W)

Freeport (FCGT2 /
8772447)(28.94N 95.30W)

Galveston Bay
Entrance/North Jetty(GNJT2 / 8771341)(29.68N 94.03W)

Galveston Pier 21(GTOT2 / 8771450)(29.36N 94.72W)

2.87

3.96

2.7

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Matagorda Bay
Entrance Channel(MBET2 / 8773767)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

26/0130993.9

26/0224

58

68

2.76

29/10541002.326/0048

29

40

4.06

4.74

3.5

25/11541001.2

25/1130

21

31

1.64

1.93

1.4

2.3

(28.643N 96.33W)

Morgans Point(MGPT2 / 8770613)(29.68N 94.98W)

Port Isabel TX (PTIT2/ 8779770)(26.06N 97.21W)(11.6 m)Rainbow Bridge(8770520)

3.38

2.9

(29.98N 93.88W)

Rockport (RCPT2 /8774770)

26/0336941.8

26/0154

30/0848998.2

26/1812

25/1254

1000.1

25/1548

30/0848995.5

29/0800(28.02N 97.05W)

Sabine Pass North(SBPT2 / 8770570)(29.73N 93.87W)

SPI Brazos Santiago(BZST2 / 8779749)

59 F

94

1.97 I

3.16

47

3.44

4.78

33

40

1.67

1.4

43

53

3.26

3.1

(7.5 m)33(7.9 m)3.2(26.07N 97.15W)

Texas Point (TXPT2 /8770822)(29.69N 93.84W)(12.5 m)Remote Automated Weather Station (RAWS) Sites
Aransas Wildlife
Refuge (AFWT2)

25/225945

94

25/231244 F

72

29/2035

23

38

26/120450

72

30/18041734(28.30N 96.82W)

Matagorda Island(MIRT2)(28.12N 96.80W)

McFadden National
Wildlife Refuge(FADT2)(29.71N 94.12W)

Victoria (VCRT2)(28.86N 96.92W)

Woodville (WVLT2)(30.75N 94.40W)

30/1104

989.8

35

Total
rain
(in)

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

69

92

44

55

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation(ft)E

Texas Coastal Observing Network Sites
Aransas Wildlife
Refuge (AWRT2 /8774230)

26/0424970.5

26/01124.80

4.8

25/2306

995.5

25/2230

26/0400

944.0

26/0306

79

103

4.12

4.0

29/1106

1000.329/0254

38

52

3.15

29/1842999.8

29/1848

33

41

5.13

28/10421003.2

27/1918

26

37

7.75

28/0900

1001.6

26/0706

24

31

11.52

10.5J

28/1718997.3

26/0300

37

48

3.33

3.2

26/0254989.3

26/032451

65

26/0136986.1

25/2318

58

72

4.77

5.51

4.7

26/0224959.3

25/2242

69

5.65

6.17

5.3

26/0202964

26/0142115

1.63 I

30/0936996.1

30/0124

36

4.20(28.23N 96.80W)

Baffin Bay (BABT2)(27.30N 97.40W)

Copano Bay (CPNT2 /8774513)(10 m)(28.11N 97.02W)

Galveston Railroad
Bridge (GRRT2 /8771486)

3.73

2.8

(29.30N 94.90W)

High Island (HIST2 /8770808)

4.1(29.59N 94.39W)

Lynchburg Landing(LYBT2 / 8770733)

8.85

7.3J

(29.76N 95.08W)

Manchester (NCHT2 /8770777)(29.73N 95.27W)

Matagorda City(EMAT2 / 8773146)(28.71N 95.91W)

Nueces Bay (NUET2 /8775244)(27.83N 97.49W)

Packery Channel(PACT2 / 8775792)(27.63N 97.24W)

Port Aransas (RTAT2 /8775237)(27.84N 97.07W)

Port Aransas Sentinel(ANPT2 / 8775241)(27.84N 97.04W)

Port Arthur (PORT2 /8770475)(27.84N 97.04W)

36(10.7 m)50 F
(10.7 m)96 F
(14.2 m)26
(10.7 m)

3.7

Total
rain
(in)

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location

Port Lavaca (VCAT2 /8773259)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Date/
time
(UTC)

Press.
(mb)

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

26/0942993.3

26/0806

53

67

7.06

6.7

26/0354994.2

26/1054

54

70

3.25

3.0

25/14121001.625/1542

25/1836

999.6

25/1836

29/1806

999.6

28/0454

3.87

3.2

25/2306

991.7

26/0142

29/1018

1002.926/0130

38

59

3.22

3.3

28/2024998.3

26/0742

43

55

3.19

3.0

26/0606

985.5

26/0630

54

74

5.77

5.5

25/1300

1000.925/1518

40

1.77

1.4

26/0242987.8(28.64N 96.61W)

Port O’Connor(PCNT2 / 8773701)(28.45N 96.40W)

Realitos Peninsula(RLIT2 / 8779280)

(9 m)

28

36

34

41

(26.26N 97.28W)

Rincon del San Jose(RSJT2 / 8777812)(26.80N 97.47W)

Rollover Pass (RLOT2/ 8770971)(10 m)

37

44

47

62

(29.52N 94.51W)

S Bird Island (IRDT2 /8776139)(27.48N 97.32W)

San Luis Pass (LUIT2/ 8771972)(4.3 m)(29.08N 95.12W)

Sargent (SGNT2 /8772985)(28.77N 95.62W)

Seadrift (SDRT2 /8773037)(28.41N 96.71W)

South Padre Island
Coast Guard Station(PCGT2 / 8779748)(10.1 m)32

(26.07N 97.17W)

USS Lexington(TAQT2 / 8775296)

1.18(27.82N 97.39W)

Weatherflow Sites
Clear Lake Park(XCLP)

26/0420(29.56N 95.07W)

Corpus Christi (XCRP)(27.59N 97.30W)

26/0132986

37

26/030429(9.8 m)47(10 m, 1 min)

46

65

2.06

1.0

Total
rain
(in)

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

Crab Lake (XCRB)

Date/
time
(UTC)A

29/1843(29.46N 94.62W)

Galveston Bay (XGAL)

26/0401(29.54N 94.91W)

Galveston Fishing Pier(XGPR)

25/1836(29.24N 94.85W)

Laguna Shores(XLAG)

26/206985.4

25/2217(27.63N 97.29W)

Levee (XLEV)

25/2320(29.42N 94.89W)

Matagorda Bay(XMGB)

26/0458(28.59N 95.98W)

Poenisch Park
(XPOE)

26/0220988.4

26/0115

26/0335984.7

26/0355(27.72N 97.34W)

Portland Wildcat(XWLD)(27.86N 97.32W)

Seabrook (XSBK)(29.55N 95.02W)

South Padre Island(XPAD)

26/0315

25/1030(26.08N 97.17W)

South Padre Island
SPIW Park (XSPP)

25/1120(26.16N 97.17W)

Surfside Beach(XSRF)

25/2206(28.92N 95.29W)

Texas City (XTEX)(29.36N 94.95W)

26/0226

Sustained
(kt)B

Gust
(kt)

47

53

(19.8 m)35
(5.2 m)43(11.6 m)

52
(10 m, 1 min)38
(8.2 m)48(6.1 m)

49(10 m, 1 min)

48 F
(5 m, 5 min)34
(9.1 m)30(12.2 m, 5 min)29
(5.5 m, 5 min)37
(7.6 m)42(19.8 m)

42

50

71

45

56

64

64

41

38

37

50

48

Texas Tech University Hurricane Research Team StickNet
0102A(27.88N 97.29W)

38

50(2.25 m, 1 min)

66

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

0103A
(27.91N 97.13W)

0104A(28.11N 97.03W)

0105A(28.34N 96.93W)

0106A(28.44N 96.73W)

0108A(28.03N 97.24W)

0110A(28.41N 96.87W)

0111A(28.66N 96.42W)

0112A(28.59N 96.63W)

0213A(27.70N 97.15W)

0214A(27.59N 97.22W)

0220A(28.16N 97.21W)

Press.
(mb)

39

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

69

94

(2.25 m, 1 min)69 F
(2.25 m, 1 min)71
(2.25 m, 1 min)57
(2.25 m, 1 min)73
(2.25 m, 1 min)68
(2.25 m, 1 min)69
(2.25 m, 1 min)44
(2.25 m, 1 min)66
(2.25 m, 1 min)53
(2.25 m, 1 min)

74 F
(2.25 m, 1 min)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

88

90

76

86

89

53

58

80

68

86

Other Sites
Beaumont 4 S(JZHT2)49.06(30.02N 94.14W)

Beaumont 4 WSW(JZLT2)46.54(30.06N 94.21W)

Beaumont 4 WSW(JZNT2)(30.04N 94.08W)

46.38

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

40

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Bevil Oaks 5 ENE(JYOT2)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

47.28

(30.18N 94.19W)

Brazos Santiago Pass
(BRZT2)

25/1254

1000.1(26.07N 97.15W)

25/154832(10 m, 6 min)38

Central Gardens 5 NW
(JZJT2)46.54(30.06N 94.21W)

China 2 S (JZTT2)

47.44(30.02N 94.33W)

Clear Lake

48.14

(29.56N 95.14W)

Coleto Creek (CKDT2)

77(28.73N 97.17W)

Copano Bay
Causeway Park
Ellington Field 2 E(29.60N 95.12W)

Fannet 5 WNW(JZVT2)

26/0356

9.42

944.7

52.00

45.00

(29.95N 94.33W)

Fannett 1 NE (JZPT2)(29.93N 94.24W)

Friendswood(29.05N 95.20W)

Friendswood(29.74N 95.57W)

Friendswood 2 E(29.50N 95.16W)

Friendswood 2 NNW(29.54N 95.22W)

49.25

56.00

54.00

47.40

50.04

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

41

Date/
time
(UTC)A

Sustained(kt)B

Goliad 10 S
(KTXGOLIA4)

Gust
(kt)

54 F

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

22.68

(28.52N 97.41W)

GWRT2

26/1406(28.36N 98.12W)

21

35

Hamshire 5 SSW(JYST2)45.79(29.79N 94.34W)

Highlands 2 SSE(BATT2)45.10(29.79N 95.04W)

Horsepen Creek @Bay Area Boulevard

45.68(29.58N 95.10W)

Johnson Space
Center Building B30

26/2355(12.2 m)47

26/1415

23

36

40

50

26/151627

44

26/1500

21

35

40

42

(29.55N 95.09W)

KTXCUERO1(29.15N 97.30W)

KTXCUERO3(29.15N 97.30W)

26/1435

992.6

26/1540989.2

KTXSMILE2(29.29N 97.57W)

KTXSMILE3(29.12N 97.62W)

KTXYORK4(29.03N 97.53W)

KTXYORK6(28.91N 97.50W)

League City
(DW6282)

26/1647

991.2

45.66

(29.50N 95.10W)

League City 3 S(29.43N 95.11W)

52.87

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

42

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

League City 3 W

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

45.34

(29.48W 95.16W)

League City 4 S

51.62(29.42N 95.11W)

Liberty 2 WSW(LBYT2)49.39(30.06N 94.82W)

Nassau Bay 2 SSE

47.86(29.51N 95.08W)

Port Arthur 18 WSW(JYHT2)47.99(29.79N 94.21W)

Port Lavaca U. Florida
Research Tower(FCMP T3)

26/043843(10 m, 1 min)44

(28.61N 96.63W)

Rockport (iCyclone)(28.058N 97.041W)

26/0331940.8

Rockport Doppler on
Wheels Anemometer(NSFDOW)

93(adjusted to 10
m, 1 min)122(28.08N 97.04W)

Rockport U. Florida
Research Tower(FCMP T2)

26/0402

941.3

26/0252

88(10 m, 1 min)122

(28.08N 97.05W)

Santa Fe 3 ENE

54.77(29.39N 95.05W)

South Padre Island(SPIT2)
Texas A&M Corpus
Christi

25/151832

25/1300

1000.926/0153985

75

26/1203984.4

74(26.06N 97.17W)(10 m, 6 min)

40

2.40

(27.71N 97.32W)

Victoria (TXVC-4)(28.52N 97.41W)

14.29

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

43

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Storm
surge
(ft)C

Storm
tide
(ft)D

Webster 2 NW

Estimated
Inundation
(ft)E

Total
rain
(in)

52.30

(29.55N 95.14W)

Webster 2 S

48.20(29.51N 95.12W)

Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) Sites
Beaumont 4.6 S(TX-JJ-11)

45.50(30.02N 94.16W)

Dayton 0.2 E(TX-LR-14)

49.31(30.05N 94.89W)

Pasadena 4.4 WSW(TX-HRR-93)

45.74(29.68N 95.22W)

Santa Fe 0.7 S(TX-GV-60)

46.70(29.37N 95.10W)

National Severe Storms Laboratory (NSSL) Probes
Taft (NSSL Probe)(28.04N 97.33W)

Woodsboro (NSSL
Probe)

26/041026/0641(28.22N 97.35W)

65(3.4 m, 1 min)60
(3.4 m, 1 min)82

76

Center for Severe Weather Research (CWSR) Probes
Rockport (Pod B)(28.08N 97.04W)

Rockport (Pod C)(28.09N 97.04W)

Rockport (Pod D)(28.11N 97.03W)

26/0227

26/0139

26/0138

50 F(1 m, 1 min)

48 F
(1 m, 1 min)

64 F
(1 m, 1 min)

68

67

86

Jefferson County Drainage District Rain Gauges
Boondocks Road @Taylors Bayou, South
Fork (6400)(29.85N 94.23W)

47.99

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Craigen Road @Taylors Bayou D-500(5620)

Press.
(mb)

44

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

47.28

(29.88N 94.26W)

East Bay Bayou @Skillern Tract (5050)

47.44(29.63N 94.41W)

Frint Road Willow
Marsh Bayou (2900)

46.38(30.00N 94.16W)

Glenbrook Drive @Green Acres / Ditch
407 (3200)

49.25(29.94N 94.23W)

Groves 1.3 N (8906)(29.96N 93.92W)

Highland Ave @ Ditch
104 (2500)

60.54

46.50

(30.03N 94.08W)

Landis Drive @ Ditch
202B (2700)

46.57(30.07N 94.20W)

Mayhaw Bayou @Englin Road (7200)

45.79(29.79N 94.34W)

Nederland 1.5 SW(8920)

60.58K(29.95N 94.01W)

Pine Tree Ditch 601
South China Road
(6200)

45.00(29.97N 94.34W)

Pipkin Ranch @Willow Slough Ditch
550 (6720)

45.12(29.77N 94.20W)

Port Arthur 6.4 WNW(8918)

45.26(29.93N 94.03W)

Rush Ditch @ Hwy
1663 (6350)(29.86N 94.45W)

45.20

Hurricane Harvey

Minimum Sea Level
Pressure

Maximum Surface
Wind Speed

Location
Date/
time
(UTC)

Press.
(mb)

45

Date/
time
(UTC)A

Sustained
(kt)B

Gust
(kt)

South China Road
Ditch 608 (5200)

Storm
surge
(ft)C

Storm
tide
(ft)D

Estimated
Inundation
(ft)E

Total
rain
(in)

47.44

(30.03N 94.33W)

State Highway 124 @Hillebrandt Bayou(2300)

49.06(30.04N 94.15W)

State Hwy 365 @Green Pond Gully(5400)

45.00(29.94N 94.33W)

Winne Wetlands @Mayhaw Bayou (5250)

47.52(29.80N 94.36W)

Earth Networks Mesonet Sites
Corpus Christi KRISTV (KRIST)

26/0255(27.79N 97.40W)

Rockport Texas
Maritime Museum(RCKPR)

26/2335

32 F(10.6 m, 2 min)41 F
(7.9 m, 2 min)

63

67

(28.03N 97.05W)

Seadrift DOW
Chemical (SDRFT)(28.52N 96.77)
A

26/1125

46 F(10.6 m, 2 min)78

Date/time is for sustained wind when both sustained and gust are listed.
Except as noted, sustained wind averaging periods for C-MAN and land-based reports are 2 min; buoy averaging
periods are 8 min.
C Storm surge is water height above normal astronomical tide level.
D For most locations, storm tide is water height above the North American Vertical Datum of 1988 (NAVD88).
E Estimated inundation is the maximum height of water above ground. For NOS tide gauges, the height of the water
above Mean Higher High Water (MHHW) is used as a proxy for inundation.
E Estimated inundation is the maximum height of water above ground. For NOS tide gauges, the height of the water
above Mean Higher High Water (MHHW) is used as a proxy for inundation.
F Anemometer damaged or data recording otherwise interrupted and likely did not record maximum winds.
G Station 42020 went adrift on 8/25 around 1800 UTC and stopped reporting at that time.
H Surge is estimated using a pre-storm baseline for USCOE and USGS gauges
I Sensor damaged or destroyed and likely did not record maximum water level
J Significantly affected by excessive fresh water rainfall runoff
K Preliminary highest tropical cyclone storm total rainfall in U.S. history

BHurricane Harvey

Table 4.

Direct deaths by county in Texas associated with Harvey.

CountyDirect Deaths

HarrisOrangeJefferson
GalvestonMontgomery
San Jacinto
Ft. Bend
JasperNewtonHardinWalker

36
9
5
3
3
3
3
2
2
1
1

Total

68

46

Hurricane Harvey

Table 5a.

47

Number of hours in advance of formation of Harvey east of the Lesser Antilles
associated with the first NHC Tropical Weather Outlook forecast in the indicatedlikelihood category. Note that the timings for the “Low” category do not include
forecasts of a 0% chance of genesis.
Hours Before Genesis
48-Hour Outlook

120-Hour Outlook

Low (<40%)

84

96

Medium (40%-60%)

12

72

High (>60%)

Table 5b.

Number of hours in advance of reformation of Harvey in the Gulf of Mexico withthe first NHC Tropical Weather Outlook forecast in the indicated likelihood
category. Note that the timings for the “Low” category do not include forecasts of
a 0% chance of genesis.
Hours Before Genesis
48-Hour Outlook

120-Hour Outlook

Low (<40%)

78

78

Medium (40%-60%)

72

78

High (>60%)4266

Hurricane Harvey

Table 6a.

48

NHC official (OFCL) and climatology-persistence skill baseline (OCD5) track
forecast errors (n mi) for Harvey. Mean errors for the previous 5-yr period areshown for comparison. Official errors that are smaller than the 5-yr means areshown in boldface type.
Forecast Period (h)
12

24

36

48

72

96

120

OFCL

18.8

28.8

38.9

49.7

81.2

124.5

168.7

OCD5

35.6

68.8

112.1

157.1

239.5

305.3

350.8

Forecasts

38

36

32

28

23

20

20

OFCL (2012-16)

24.9

39.6

54.0

71.3

105.8

155.4

208.9

OCD5 (2012-16)

47.3

103.9

167.8

230.3

343.1

442.6

531.0

Hurricane Harvey

Table 6b.

49

Homogeneous comparison of selected track forecast guidance models (in n mi)for Harvey. Errors smaller than the NHC official forecast are shown in boldface
type. The number of official forecasts shown here will generally be smaller thanthat shown in Table 6a due to the homogeneity requirement.
Forecast Period (h)Model ID
12

24

36

48

72

96

120

OFCL

16.7

26.8

39.5

49.3

87.3

139.2

186.1

OCD5

33.9

65.6

104.4

148.1

238.9

325.5

370.5

GFSI

21.9

36.7

55.7

74.0

131.5

216.7

266.8

AEMI

22.2

37.4

57.5

73.0

124.2

175.8

224.1

HWFI

17.7

32.2

52.5

76.4

130.2

194.5

226.1

EGRI

19.3

28.0

35.3

41.8

76.0

147.2

244.3

EMXI

22.3

35.3

47.3

56.0

82.4

133.1

212.4

CMCI

22.8

35.8

54.8

70.1

94.5

132.4

157.8

NVGI

27.9

47.4

66.7

90.2

131.3

169.1

199.8

CTCI

17.4

26.0

40.3

51.5

71.8

122.9

193.1

TVCN

16.4

23.8

35.0

43.2

79.2

135.1

179.4

TVCX

17.0

24.7

36.7

43.5

77.7

131.8

181.2

HCCA

17.4

28.1

42.2

53.3

97.3

138.3

178.7

GFEX

21.1

33.8

50.0

61.3

102.0

169.7

226.3

FSSE

19.8

31.2

46.2

57.2

95.4

147.5

207.4

TABD

33.9

69.3

100.4

129.6

152.0

259.1

341.4

TABM

26.3

54.0

78.8

83.0

148.6

233.2

303.0

TABS

42.2

84.5

87.6

69.8

169.3

211.4

293.2

Forecasts

28

26

24

23

19

17

16

Hurricane Harvey

Table 7a.

50

NHC official (OFCL) and climatology-persistence skill baseline (OCD5) intensity
forecast errors (kt) for Harvey. Mean errors for the previous 5-yr period are shownfor comparison. Official errors that are smaller than the 5-yr means are shown inboldface type.
Forecast Period (h)
12

24

36

48

72

96

120

OFCL

5.8

8.9

12.0

15.0

6.5

3.5

6.3

OCD5

6.7

11.5

14.9

16.9

11.5

10.2

13.8

Forecasts

38

36

32

28

23

20

20

OFCL (2012-16)

5.5

8.2

10.5

12.0

13.4

14.0

14.5

OCD5 (2012-16)

7.1

10.5

13.0

15.1

17.4

18.2

20.6

Table 7b.

Homogeneous comparison of selected intensity forecast guidance models (in kt)
for Harvey. Errors smaller than the NHC official forecast are shown in boldface
type. The number of official forecasts shown here will generally be smaller thanthat shown in Table 7a due to the homogeneity requirement.
Forecast Period (h)Model ID
12

24

36

48

72

96

120

OFCL

5.0

7.2

9.8

11.7

6.3

4.1

5.9

OCD5

5.6

10.1

12.1

12.5

10.8

9.6

14.6

HWFI

6.3

8.0

8.8

7.5

7.3

8.7

11.6

DSHP

5.1

7.5

8.9

7.8

9.6

10.2

8.8

LGEM

5.1

7.2

9.1

8.9

9.1

9.2

7.9

ICON

5.1

6.3

7.9

7.6

8.4

9.2

8.1

IVCN

5.2

6.1

7.0

6.7

6.7

7.6

7.4

HCCA

5.1

6.0

7.6

7.7

8.5

9.4

8.8

FSSE

5.5

6.6

8.1

8.5

11.5

10.9

7.6

GFSI

7.4

8.6

7.9

8.9

5.6

5.6

10.4

EMXI

8.5

12.6

16.7

18.6

23.2

27.9

32.1

Forecasts

32

30

27

23

19

17

16

Hurricane Harvey

Table 8.

51

Wind watch and warning summary for Harvey, 17 August – 1 September 2017.

Date/Time(UTC)

ActionLocation

17 / 1500

Tropical Storm Watch issued

Dominica

17 / 1500

Tropical Storm Warning issued

Martinique, St. Lucia,
Barbados, St. Vincent and
the Grenadines

18 / 1200

Tropical Storm Warning discontinued

Barbados

18 / 1800

Tropical Storm Watch discontinued

All

18 / 1800

Tropical Storm Warning discontinued

All

23 / 1500

Tropical Storm Watch issued

Mouth of the Rio Grande toPort Mansfield Texas

23 / 1500

Tropical Storm Watch issued

San Luis Pass Texas to High
Island23 / 1500

Tropical Storm Watch issued

Boca de Catan Mexico to
Mouth of the Rio Grande

23 / 1500

Hurricane Watch issued

Port Mansfield to San Luis
Pass Texas

24 / 0900

Tropical Storm Watch changed toTropical Storm Warning

Mouth of the Rio Grande toPort Mansfield

24 / 0900

Hurricane Watch issued

Mouth of the Rio Grande toPort Mansfield

24 / 0900

Tropical Storm Watch discontinued

San Luis Pass to High Island

24 / 0900

Tropical Storm Warning issued

Matagorda to High Island

24 / 0900

Hurricane Warning issued

Port Mansfield to Matagorda

24 / 2100

Tropical Storm Warning modified toSargent to High Island

Hurricane Harvey

52

24 / 2100

Hurricane Warning modified to

Port Mansfield to Sargent

25 / 1500

Hurricane Watch changed to Tropical
Storm Warning

Mouth of the Rio Grande toPort Mansfield

25 / 2100

Tropical Storm Watch discontinued

All

25 / 2100

Tropical Storm Warning discontinued

Mouth of the Rio Grande toPort Mansfield

26 / 0900

Tropical Storm Warning modified to

Port O’Connor to High Island

26 / 0900

Hurricane Warning discontinued

Port Mansfield to Sargent

26 / 1500

Tropical Storm Warning modified to

Baffin Bay to High Island

26 / 1500

Hurricane Warning discontinued

All27 / 0300

Tropical Storm Warning modified to

Baffin Bay to Sargent

27 / 0900

Tropical Storm Warning modified to

Port O’Connor to Sargent

27 / 2100

Tropical Storm Watch issued

Sargent to San Luis Pass

28 / 0300

Tropical Storm Watch discontinued

All28 / 0300

Tropical Storm Warning discontinued

Port O’Connor to Sargent

28 / 0300

Tropical Storm Warning issued

Mesquite Bay to High Island

28 / 1500

Tropical Storm Watch issued

Cameron to Intracoastal City
Louisiana

28 / 1500

Tropical Storm Warning modified to

Mesquite Bay to Cameron

28 / 2100

Tropical Storm Watch discontinued

All28 / 2100

Tropical Storm Warning modified to

Mesquite Bay to Intracoastal
City

29 / 1500

Tropical Storm Watch issued

Morgan City to Grand Isle

Hurricane Harvey

53

29 / 1500

Tropical Storm Warning discontinued

Mesquite Bay to Intracoastal
City

29 / 1500

Tropical Storm Warning modified to

Port O’Connor to Morgan City

30 / 0300

Tropical Storm Watch discontinued

All

30 / 0300

Tropical Storm Warning discontinued

Port O’Connor to Morgan City

30 / 0300

Tropical Storm Warning modified toFreeport to Grand Isle

30 / 0900

Tropical Storm Warning modified toHigh Island to Grand Isle

30 / 1200

Tropical Storm Warning modified toFreeport to Grand Isle

30 / 1800

Tropical Storm Warning modified to

Sabine Pass to Grand Isle

31 / 0000

Tropical Storm Warning discontinuedAllHurricane Harvey

Table 9.

54

United States Storm Surge Watch and Warning summary for Harvey.

Date/Time(UTC)

ActionLocation

23 / 1500

Storm Surge Watch issued

Port Mansfield to High Island,
Texas

24 / 0900

Storm Surge Warning issued

Port Mansfield to San Luis
Pass

24 / 0900

Storm Surge Watch issued

South of Port Mansfield to theMouth of the Rio Grande

24 / 1800

Storm Surge Warning issued

North San Luis Pass to High
Island25 / 2100

Storm Surge Watch discontinued

South of Port Mansfield to theMouth of the Rio Grande

26 / 0900

Storm Surge Warning discontinued

South of Baffin Bay to Port
Mansfield

26 / 1500

Storm Surge Warning discontinued

South of Port Aransas to
Baffin Bay

27 / 0300

Storm Surge Warning discontinued

All28 / 2100

Storm Surge Watch issued

Port Bolivar Texas to Morgan
City Louisiana

29 / 2100

Storm Surge Warning issued

Holly Beach to Morgan City

30 / 0900

Storm Surge Watch discontinued

West of High Island to Port
Bolivar30 / 1500

Storm Surge Watch discontinued

West of Sabine Pass to High
Island30 / 2100

Storm Surge Watch / Warning
discontinuedAllHurricane Harvey

55

Figure 1. Velocity potential anomalies at 200 mb (VP200) from 5°N-5°S (shaded, x 106 m2 s-1).
The shading shows unfiltered VP200 anomalies where negative (positive) values
represent mass divergence (convergence). Red contours show CCKW-filtered VP200
anomalies; dashed lines represent upper-level divergence (convectively active). The
contour interval begins at 1 standard deviation and contours indicate a 0.5 standard
deviation increment thereafter. The red star is the genesis point of Harvey. Figure
adapted from Michael Ventrice, IBM/The Weather Channel in collaboration with the
University of Albany, Albany NY.

Hurricane Harvey

Figure 2.

Best track positions for Hurricane Harvey, 17 August – 1 September 2017.

56

Hurricane Harvey

130

BEST TRACK
Sat (TAFB)Sat (SAB)ADT
AC (sfc)AC (flt->sfc)
AC (DVK P->W)
Scatterometer
SurfaceDrop (sfc)
Drop (LLM xtrp)
AMSU
Analysis

120
110
100

Wind Speed (kt)

57

90
80

Hurricane Harvey
17 August - 1 September 2017

70
60
50
40
30
20
8/16

8/18

8/20

8/22

8/24

8/26

8/28

8/30

9/1

9/3

Date (Month/Day)
Figure 3.

Selected wind observations and best track maximum sustained surface wind speed curve for Hurricane Harvey, 17 August – 1
September. Dropwindsonde observations include actual 10 m winds (sfc), as well as surface estimates derived from the mean
wind over the lowest 150 m of the wind sounding (LLM). Advanced Dvorak Technique estimates represent the Current Intensity
at the nominal observation time. AMSU intensity estimates are from the Cooperative Institute for Meteorological Satellite
Studies technique. Dashed vertical lines correspond to 0000 UTC, and solid vertical lines correspond to landfall.

Hurricane Harvey

58

1010

1000

Pressure (mb)990

Hurricane Harvey
17 August - 1 September 2017

980

970

960

BEST TRACKKZC P-W
Sat (TAFB)Sat (SAB)ADT
AMSU
AC (sfc)
Surface
Analysis

950

940

930
8/16

8/18

8/20

8/22

8/24

8/26

8/28

8/30

9/1

9/3

Date (Month/Day)
Figure 4.

Selected pressure observations and best track minimum central pressure curve for Hurricane Harvey, 17 August – 1 September.
Advanced Dvorak Technique estimates represent the Current Intensity at the nominal observation time. AMSU intensity
estimates are from the Cooperative Institute for Meteorological Satellite Studies technique. KZC P-W refers to pressure
estimates derived using the Knaff-Zehr-Courtney pressure-wind relationship. Dashed vertical lines correspond to 0000 UTC,and solid vertical lines correspond to landfall.

Hurricane Harvey

Figure 5.

59

Analyzed storm surge inundation (feet above ground level) along the coast of Texas and Louisiana from Hurricane Harvey.
Image courtesy NHC Storm Surge Unit.

Hurricane Harvey

Figure 6.

60

Maximum water levels (feet) measured from tide gauges along the coasts of Texas and Louisiana during Hurricane Harvey andareas covered by storm surge warnings (magenta) and watches (lavender). Water levels are referenced above Mean Higher
High Water (MHHW), which is used as a proxy for inundation (above ground level) on normally dry ground along the immediate
coastline. Image courtesy of the NHC Storm Surge Unit. Note starred values are contaminated by excessive flood runoff.

Hurricane Harvey

Figure 7.

61

Picture of Jefferson County Drainage District rain gauge in Nederland, Texas, where the U.S. tropical cyclone rainfall recordof 60.58 inches was set during Harvey.

Hurricane Harvey

Figure 8.

Observed rainfall totals (inches) in association with Harvey and its remnants. Figure courtesy David Roth (WPC).

62

Hurricane Harvey

Figure 9.

63

NOAA gauge-corrected, multi-radar multi-sensor quantitative precipitation estimates for Harvey (inches), 25 August-1
September 2017. The black numbers are actual rain gauge values, all of which exceed the previous U.S. continental rainfall
record for a tropical cyclone.

Hurricane Harvey

Figure 10.

Raw NOAA Multi-radar multi-sensor quantitative precipitation estimation (inches) for Harvey in southeastern Texas from 25
August to 1 September 2017. Figure courtesy Jonathan Brazzell of NWS Lake Charles.

64

Hurricane Harvey

Figure 11a.

65

Allison (2001) rainfall totals (left) vs Harvey rainfall totals (right) in inches for southeastern Texas with the same color and map
scale. Note almost every location in SE Texas had considerably more rainfall during Harvey. Figure courtesy David Roth
(WPC).

Hurricane Harvey

Figure 11b.

As in Figure 11a except for Beulah (1967) rainfall (left).

66

Hurricane Harvey

Figure 12.

Annual 4-day rainfall exceedance probabilities for Harvey. Image courtesy NOAA Office of Water Prediction. Note that the
track shown on the graphic was preliminary and does not reflect the final NHC best track.

67

Hurricane Harvey

Figure 13.

NCEP unified surface analysis at 1200 UTC 26 August 2017.

68

Hurricane Harvey

Figure 14.

NCEP unified surface analysis at 1200 UTC 27 August 2017.

69

Hurricane Harvey

Figure 15.

NCEP unified surface analysis at 1200 UTC 28 August 2017.

70

Hurricane Harvey

Figure 16.

NCEP unified surface analysis at 1200 UTC 29 August 2017.

71

Hurricane Harvey

Figure 17.

Tornado reports from Harvey. Figure courtesy Roger Edwards of the Storm Prediction Center.

72

Hurricane Harvey

Figure 18. Texas World Speedway after Harvey being used to store flooded cars. Photo credit Brazos Drones.

73

Hurricane Harvey

Figure 19.

An example of the water rescues that were ongoing during Harvey in Houston on 27 August 2017. Photo credit David J.
Phillip (Associated Press).

74

Hurricane Harvey

Figure 20.

NHC intensity aids (knots, colored lines) for the 1200 UTC 23 August 2017 forecast cycle for Harvey (verifying points inwhite). Note the guidance was much too low for the intensity at landfall, which occurred near the 60-h point.

75

Hurricane Harvey

Figure 21.

Same as Figure 20 but for 1200 UTC 24 August 2017. Note that much of the guidance showed rapid intensification before
landfall, which occurred near the 36-h forecast point.

76

Hurricane Harvey

Figure 22.

Time series of maximum rainfall forecasts for Harvey in southeastern Texas. Figure courtesy David Roth (WPC)77