Hurricane Hanna, the 2020 Atlantic season's first Hurricane, made landfall along the unpopulated Padre Island National Seashore on the mid-Kenedy County coastline as a Category 1 storm at around 5 PM Central Time Saturday, July 25th, carrying sustained 90 mph winds with gusts over 100 mph in a small portion of the inner eye wall. The hurricane spun slowly but steadily into southern Kenedy and northern Hidalgo County through just after midnight on the 26th, then through Starr County as a Tropical Storm before moving into Tamaulipas before daybreak and eventually near Monterrey, Nuevo Leon, by noon before dissipating during the evening of the 26th. Following the passage of the inner eye wall, broad feeder bands of torrential rains and gusty tropical storm force winds continued through the mid to late morning hours of July 26th, slowly migrating from east to west across the populated Rio Grande Valley.
Other than storm surge flooding, which peaked just north of Baffin Bay on the Kleberg and Nueces County coast near Corpus Christi, Hanna's memory for the Rio Grande Valley will be flooding rainfall, power outages, and an array of damage to poorly constructed buildings, from minor roof damage to complete demolition.  Between 8 and 15 inches of rain fell from Port Mansfield to Harlingen, and along Interstate Highway 2 out through Mission and Sullivan City. The combination of high rainfall, locally high rainfall rates, and poor drainage left between 18 inches and four feet of water depth in many areas, most commonly from western Cameron through southeastern Hidalgo County, as well as a separate pocket in the Mission/La Joya/Sullivan City area. The rainfall wiped out 95% of the region's cotton crop; the combination of crop loss and production loss was more than one third of a billion dollars alone ($366 million)...most of which was in the Rio Grande Valley region.
At the peak of the storm, 250 thousand electric customers were without power, including all of Willacy County. Though storm surge was cut short by strong westerly flow across Cameron County, radiating swells did produce a notable surge of 3 feet or greater (estimated) from near Port Mansfield through Kenedy County. When the damage and economic loss is counted to infrastructure and agriculture combined, it is likely that Hanna cost at least one billion dollars across the Rio Grande Valley and the Deep S. Texas ranch country.

Tornado in CAMERON, TEXAS
From 26-JUL-20 02:32:00 to 26-JUL-20 02:36:00 (CST-6)
Location: (BRO)BROWNSVILLE ARP
Tornado F-scale: EF0
Property damage: 250.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Hurricane Hanna made landfall along the Kenedy county
coast on the evening of July 25, 2020. As Hanna pushed inland, its
eastern outer rain bands produced several areas of rotation. One
area of stronger rotation developed south of Brownsville just across
the Rio Grande in Mexico. The Brownsville radar briefly detected
a debris signature as it moved northward toward the Brownsville
airport. The Brownsville airport, in addition to residents in
nearby neighborhoods, reported wind damage.
The initial touchdown was discovered about 2.3 miles south
of Brownsville/South Padre Island International Airport.  Here, an
empty tractor trailer was moved on an angle into a stand of trees,
an unanchored travel trailer was flipped, a storage shed was flattened,
and several mesquite trees lost large limbs. A few minutes later, several
areas of damage occurred on the west side of the Brownsville airport.
A dozen windows were blown out of an airplane hangar building, an
unanchored old jet staircase was flipped and a garage door
collapsed inward. In addition, a Boeing 737 aircraft was moved into a
hangar, causing damage to the hangar wall. No damage was noted to
the plane itself. As the tornado moved to the north northwest,
several large tree limbs were snapped, in addition to a weak
uprooted tree. Finally further north, two homes lost large sections
of their roofs with most walls still standing. The brief tornado
then lifted with no other tornado damage found.
Based on the survey and quality of construction materials surveyed, the tornado was rated EF0 with peak winds of 75 mph.

Flash Flood in WILLACY, TEXAS
From 25-JUL-20 20:30:00 to 26-JUL-20 00:30:00 (CST-6)
Location: PORT MANSFIELD
Flood cause: Heavy Rain
Property damage: 5.98M
Crop damage: 36.10M
Reported by: Broadcast Media

Reports of high flowing water blocking passage along SR-186 just west of Port Mansfield were received during the evening of July 25th, when feeder bands into the eastern semicircle of then-Tropical Storm Hanna dropped an additional 4 to 8 inches of rainfall into central and eastern Willacy County. Other flooding was noted in poor drainage locations of Raymondville, and there was an unknown amount of field flooding in eastern Willacy County due to an estimated 11 to 13 inches of rainfall through the duration of the event, which began during the mid afternoon of July 25th.
Water depths of 2 to 3 feet were likely in some areas, though specifics were unknown.  A known poor drainage location at an apartment complex in south Raymondville had up to 3 feet of water depth in parking areas, blocking access to the facility.  Other flood related damage in central Willacy County was minimal. In Port Mansfield, where nearly 15 inches of rain fell, including 9 inches in initial inner eyewall bands on July 25th, sandy soil and antecedent dry conditions kept flooding to a minimum.
Crop damage from flooding rain was significant in Willacy County, including a heavy loss of cotton lint (or bolls) which were destroyed by the flood.  Estimates suggest that $36 million in cotton crop was lost from Hanna's flooding rains.
Property damage from flood waters was calculated using NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts). Total property damage from flood waters for Willacy County was $5.98 million.

Storm Surge/Tide in COASTAL WILLACY, TEXAS
From 25-JUL-20 14:00:00 to 25-JUL-20 21:00:00 (CST-6)
Property damage: 11.87K
Crop damage: 0.00K
Reported by: C-MAN Station

Storm surge generated by Hurricane Hanna pushed water and breaking waves deep into the dunes in the Willacy County portion of the Padre Island National Seashore (PINS), mainly between mile marker 55 and 60 to the Mansfield cut.  There was likely water deep into the dunes farther south in coastal Willacy County, but levels are unknown.  A sharp cutoff to significant surge/coastal flooding was likely near the Cameron County line, where strengthening westerly flow held sea water from reaching into the dunes after the morning high tide on July 25th.  Though high water marks had not been specifically provided on the Willacy County section of PINS at the time of this writing, ground and aerial surveys along with video taken just prior to landfall in Kenedy County suggested water levels above ground may have exceeded 3 feet above normally dry ground in this area. Dunes were severely eroded north of the Mansfield Cut.
Along Laguna Madre, tides ran out on northwest flow ahead of landfall, but rose sharply on strong southeast to south flow post-landfall. This produced another surge event on the 26th...see the second event listing for Coastal Willacy for details.
Other than severe beach erosion, there was little known property damage due to Storm Surge in largely unpopulated coastal Willacy County north of the Mansfield cut. However, damage estimates for fishing huts and other coastal properties was calculated by local storm data experts using NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts) and was $11,866 for coastal Willacy County.

Tropical Storm in NORTHERN HIDALGO COUNTY, TEXAS
From 25-JUL-20 17:30:00 to 26-JUL-20 02:00:00 (CST-6)
Property damage: 33.25M
Reported by: AWOS

The slowly weakening inner eyewall of Hurricane Hanna eased into northern Hidalgo County during the early evening of July 25th and would exit a few hours after midnight on the 26th.  The Automated Weather Observing System 11 miles north of Edinburg reported a peak sustained wind of 45 mph with a peak gust of 54 mph soon after 6 PM CST on the 25th before the sensor stopped reporting.  Farther east, near the Willacy County line, a sensor reported a peak gust to 80 mph (Texas Agriscience Center, just a few miles from the Willacy County line) as the southern inner eyewall crossed at 1005 PM CST - just on the edge of the Northern Hidalgo zone area.
A NWS Storm Survey team investigated some of the area and found dozens of large tree limbs blown down along IH 69C/US 281. No significant structural damage was reported along the route, though not all areas were surveyed and it's likely that there may have been additional rural damage between San Manuel and Raymondville along and near SR 186. Based on NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts) there was likely $33.25 million in damage for Northern Hidalgo.

Tropical Storm in STARR, TEXAS
From 25-JUL-20 20:00:00 to 26-JUL-20 06:30:00 (CST-6)
Property damage: 32.50M
Reported by: Mesonet

Hurricane Hanna weakened to a Tropical Storm as it moved into Hidalgo and Starr County before exiting the US into northwest Tamaulipas and northern Nuevo Leon, Mexico, during the post-daybreak hours of July 26th.  Though weakening, the well-organized and large cyclone maintained tropical storm force wind gusts measured as high as 64 mph in northeast Starr County during the pre-dawn hours of the 26th. The Remote Automated Weather Station at Falcon Lake in southwestern Starr reported a peak gust to 52 mph at 111 AM CST, also on the 26th.
Local ranchers reported an unknown number of large limbs blown down, along with a few barns pushed off their moorings and an unknown number of buildings with shingle damage, in the eastern half of the county.  A tin roof was blown off a service station in Roma. NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts) was $32.5 million for Starr County.

Flood in HIDALGO, TEXAS
From 26-JUL-20 18:00:00 to 31-JUL-20 23:59:00 (CST-6)
Location: MERCEDES OLD REB ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

High standing water due to a total of 7 to 10 inches of rainfall that fell directly from Hurricane/Tropical Storm Hanna from late on July 25th through early afternoon on July 26th continue to close roads and stand in neighborhoods, fields, and ditches through the end of July between the east side of Edinburg and the Cameron/Willacy/Hidalgo County line. An additional 3 to 5 inches fell during the late afternoon and early evening of July 27th from an unrelated tropical rain band, leaving total rainfall of 10 to 15 inches in the area.  Conditions began to improve on the west end of the flood area by July 30th, including areas west of North Donna.
A combination of the heavy rain with known drainage capacity issues in the form of pumps, pipes, and retention kept water levels ranging from 18 inches to four feet deep on at least a dozen roads, including portions of SR 107 into La Villa as well as neighborhoods along and east of Veterans Blvd. from Pharr to east of Edinburg out to Elsa/Edcouch and near Monte Alto.   Fields saw similar water levels, and low lying neighborhoods had high water near homes, with spot-built farm homes seeing some water inside. This included a number of colonias where streets remained flooded with 1 to 3 feet of water for days after the rain ended.  For a third straight summer, the Las Brisas neighborhood in northeast Weslaco had 1 to 3 feet of water in streets and curbsides, with at least two homes with 6 inches to a foot of water inside.

Another round of torrential rains on August 1st would keep the high waters going a bit longer  mainly in areas along and east of FM 1015 (Weslaco to Elsa and points east) before dry weather allowed all water to recede.
Note:  Public Assistance (which includes damage to roads and bridges) and Crop damage is listed on the Flash Flood event in western Cameron County for brevity. Individual assistance and insured damage from flooding in this area was likely to be in the millions of dollars.  A value of nearly $23 million was added for privately insured damage, as reported through the National Flood Insurance Program through FEMA, to the flash flood entry in Hidalgo County.

Flood in WILLACY, TEXAS
From 26-JUL-20 16:00:00 to 31-JUL-20 23:59:00 (CST-6)
Location: SEBASTIAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

High standing water due to a total of 7 to 10 inches of rainfall that fell directly from Hurricane/Tropical Storm Hanna from late on July 25th through early afternoon on July 26th continued to close roads and stand in neighborhoods, fields, and ditches through the end of July. An additional 2 to 3 inches fell during the late afternoon and early evening of July 27th from an unrelated tropical rain band, leaving total rainfall of 10 to 15 inches in the area.
A combination of the heavy rain with known drainage capacity issues in the form of pumps, pipes, and retention kept water levels ranging from one to three feet deep on several Farm-to-Market and County Roads in the southwest corner of Willacy County from near Sebastian to north of Lyford to the eastern Hidalgo County line.  Fields saw similar water levels, and low lying neighborhoods had high water near homes, with spot-built farm homes seeing some water inside.
Note:  Public Assistance (which includes damage to roads and bridges) and Crop damage is listed on the Flash Flood event in southwestern Willacy County for brevity. Individual assistance and insured damage reported through the National Flood Insurance Program was estimated to be around $6 million for Willacy County. This information is also included in the flash flood entry, as mentioned above.

Hurricane (Typhoon) in WILLACY, TEXAS
From 25-JUL-20 13:15:00 to 25-JUL-20 23:00:00 (CST-6)
Property damage: 142.24M
Crop damage: 34.60M
Reported by: Buoy

Hurricane Hanna moved across the western Gulf of Mexico and made landfall on the mid-Kenedy County coastline at around 5 PM Central Time Saturday, July 25th, carrying sustained 90 mph winds with gusts over 100 mph in a small portion of the inner eye wall. While there aren't many observations in Willacy County during this event, Buoy RSJT2 is just off the coastline in the Laguna Madre just north of Willacy County and can be used as a reasonable proxy. Based on the proxy observations, sustained winds likely reached near hurricane force (71 mph).With observations from RSJT2, along with radar analysis, it is reasonable to assume that portions of Willacy County experienced hurricane-force winds around 14:30 CST to 16:30 CST.
Substantial and widespread wind damage was noted in and near Raymondville.  A damage survey estimated wind gusts in Raymondville to have reached 75 to 80 mph during the period of eyewall passage, though strong tropical storm force gusts continued well into the evening and overnight of July 25/26 as the back side feeder bands continued to pummel the county from Raymondville to Lyford to Lasara and Sebastian. A peak gust of 80 mph was recorded in neighboring Hidalgo County, a few miles southwest of the Hidalgo/Willacy County line, at 1005 PM CST July 25.
Damage included roof, shingle, and some wall damage to several dozen homes in Raymondville, as well as damage to farm buildings on the east side of town.  100 percent of the county was without power during the peak of the storm, due to dozens of snapped or leaning power poles and downed lines.  Thousands of trees/limbs were snapped and dozens uprooted. A stadium light stanchion was ripped out of the ground by an eddy wind at Raymondville High School. Similar but lesser damage was seen in Lyford and Sebastian, where peak winds may have been closer to tropical storm force.   Final individual assistance and insured property damage estimates for inland Willacy County were provided at the end of 2020 by NCEI. Local storm data experts partitioned the total damage estimate between the affected counties, and the portion for inland Willacy was $139.65 million. Public assistance damage estimates were $2.59 million.
Sustained crop damage costs associated with these damaging winds is estimated to be 34.6 million - a combination of citrus and sugar cane.

Hurricane (Typhoon) in COASTAL WILLACY, TEXAS
From 25-JUL-20 13:15:00 to 25-JUL-20 20:00:00 (CST-6)
Property damage: 59.98M
Reported by: Buoy

Hurricane Hanna moved across the western Gulf of Mexico and made landfall on the mid-Kenedy County coastline at around 5 PM Central Time Saturday, July 25th, carrying sustained 90 mph winds with gusts over 100 mph in a small portion of the inner eye wall. While there aren't many observations in Willacy County during this event, Buoy RSJT2 is just off the coastline in the Laguna Madre just north of Willacy County and can be used as a reasonable proxy. Based on the proxy observations, sustained winds likely reached near hurricane force (71 mph). With observations from RSJT2, along with radar analysis, it is reasonable to assume that portions of Willacy County experienced hurricane-force winds around 14:30 CST to 16:30 CST.
Damage surveys revealed significant property and flora damage in Port Mansfield.
Poorly built or poorly anchored structures sustained the heaviest damage, including several flipped recreational vehicles and several partially or totally destroyed mobile trailer homes.  Near Laguna Madre, all moderately constructed homes in one neighborhood had varying damage to roofs/shingles, fences, siding, and outbuildings.  A few boat garage doors were blown out along bayside entries.  Dozens of tree limbs were blown down and several uprooted, and at least a dozen power poles were snapped or leaning along SR 186 in and near Port Mansfield.
NCEI's new report as of the end of 2020, totaled Hanna as a 1.1 billion dollar damage event, so total property damage was updated in early 2021.  Public Assistance property damage estimates, mainly due to wind, were around $127.6 thousand, and NCEI's estimate (divided among the affected counties by local storm data experts) was $59.85 million for coastal Willacy County.

Tropical Storm in SOUTHERN HIDALGO COUNTY, TEXAS
From 25-JUL-20 18:30:00 to 26-JUL-20 04:30:00 (CST-6)
Property damage: 304.94M
Crop damage: 29.20M
Reported by: NWS Storm Survey

The slowly weakening inner eyewall of Hurricane Hanna eased into southern Hidalgo County along the Willacy County line during the evening of July 25th and would exit the southwest corner of the county just before daybreak on the 26th.  Widespread wind damage was noted in more than a dozen colonias from near Elsa/Edcouch to north of Edinburg (San Carlos to Doolittle), including damage to roofs, walls, shingles, and windows to dozens of poorly constructed/anchored homes severely damaged and at least a dozen (that were seen on survey) were demolished. Hundreds of trees and dozens of power poles were damaged (leaning or snapped), and power outages across this area were likely to be around 150 thousand in total. NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts) was $299.25 million for Southern Hidalgo County, and public assistance dollars due to wind were estimated at $5.7 million.
An automated sensor several miles northeast of Elsa (Texas AgriScience Center platform) reported a peak gust to 80 mph as the southern inner eyewall crossed at 1005 PM CST. Peak winds at McAllen/Miller Airport were 39 mph (at 245 CST on the 26th), but a peak gust of 60 mph was recorded at 928 PM CST on the 25th.  Additional gusts between 40 and 50 mph occurred through the night as the eastern eyewall of the weakened system (a tropical storm) oozed through southwest Hidalgo County. In general, peak winds were measured/estimated at 65 to 80 mph in the area near the Willacy County line, and 60 to 65 mph in the McAllen/Mission/Sullivan City area.
Wind damaged crops was also common in the Rio Grande Valley's breadbasket with an estimated $29.2 million in citrus and snapped sugar cane alone, based on an initial report from Texas Agrilife.
While there were no direct fatalities with Hanna in southern Hidalgo County, there were five indirect deaths in the recovery days following Hanna. Four in one family from carbon monoxide poisoning on July 27th, and one elderly man who fell from a ladder while attempting roof repairs on July 28th.

Tropical Storm in CAMERON, TEXAS
From 25-JUL-20 13:30:00 to 26-JUL-20 00:00:00 (CST-6)
Property damage: 101.63M
Crop damage: 25.90M
Reported by: ASOS

Tropical Storm-force winds ravaged northern Cameron County from mid afternoon on July 25th until just after midnight on July 26th.  Strongest winds occurred during the evening of July 25th, when the southern and eastern eyewall clipped the region along and north of Interstate 2 between Harlingen/Rio Hondo and La Feria north to the Willacy County line.  Measured and estimated wind gusts in these areas were near hurricane force (65 mph) with sustained winds peaking between 40 and 50 mph.  Harlingen/Rio Grande Valley International Airport reported a peak gust to 63 mph before taking a power loss.
The slow movement of the inner core of Hanna allowed minor wind damage to occur in this area, with at least one hundred trees losing large limbs along with power lines and several power poles snapped or bent. Minor damage also occurred to poorly built structures along the IH-2 corridor as well as along the IH-69E corridor from Harlingen/San Benito northward.  This included a number of fences blown down and a roof blown off a shed near La Feria. At the storm's peak, an estimated 50 thousand electric customers were without power.  NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts) was $99.75 million for inland Cameron County. Public Assistance dollar values were estimated to be $1.88 million.
Crop damage was also significant, with sugar cane snapped in many fields and young fruit being blown off citrus trees, which also sustained damage.  Estimated dollar value loss based on reports from Texas Agrilife in late summer was $25.9 million in Cameron County.

Flash Flood in HIDALGO, TEXAS
From 26-JUL-20 00:00:00 to 26-JUL-20 18:00:00 (CST-6)
Location: RETAMPEGO
Flood cause: Heavy Rain
Property damage: 31.91M
Crop damage: 27.10M
Reported by: Emergency Manager

Torrential rains associated with both the eastern and southern eyewall (late evening of July 25th) and persistent southeast to northwest feeder bands that followed (after midnight through late afternoon of July 26th) created widespread flash and areal flooding across many portions of populated Hidalgo County as then-Tropical Storm Hanna slowly moved from Hidalgo County into Starr County, Texas, and eventually into northern Mexico on July 26th.  Heaviest rainfall directly associated with Hanna and the feeder bands fell in the Mission-South McAllen-Pharr region, where measured and estimated rainfall of 10 to 15 inches produced 18 inches to 4 feet of water depth and required a number of water rescues during the prolonged period of flooding.  A few specific reports included:
*Numerous water rescues in the City of Mission (pre-dawn hours, July 26)
*Numerous streets with up to 2 feet of water depth in Weslaco (8 AM July 26 report)
*Canal overtopping banks and flooding roads in South McAllen on S. 23rd Street (830 AM July 26th)
*3 feet of water, rising, in Mission (830 AM report)
*Water entering homes in southeast Edinburg, estimated just after sunrise July 26
An unknown number of properties were damaged by floodwaters, but dozens if not hundreds of vehicles had varying levels of floodwater inside them. In total, there were at least 200 persons and several dozen pets rescued/evacuated by State of Texas rescue teams from Texas Task Force 1 and the Texas Parks and Wildlife Department, to name two.
Public and individual assistance dollar damages, as well as insured damages, from flood waters was calculated using NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts). Total property damage from flood waters for Cameron County was $9.968 million. In addition, an initial public assistance value was available - subject to further updates - and was estimated to be $7.99 million.  Please note that a second round of flooding rain on July 27th exacerbated the ongoing conditions but that value is folded into this episode for brevity.  Crop damage due to the flooding was estimated to be 27.1 million, heavily weighted by damage to cotton but also some damage to other dryland crops.
Final public,  individual assistance, and insured damage was likely to range somewhere from $200 to $500 million when all data are counted later in 2020 and beyond.

Storm Surge/Tide in COASTAL KENEDY COUNTY, TEXAS
From 25-JUL-20 14:00:00 to 26-JUL-20 23:00:00 (CST-6)
Property damage: 11.87K
Crop damage: 0.00K
Reported by: C-MAN Station

Storm surge generated by Hurricane Hanna pushed tide levels above ground in excess of 3 feet along coastal Kenedy County beginning by mid afternoon of July 25th and likely continuing through landfall at approximately 4 PM local standard time on the mid-Kenedy County coast along the Padre Island National Seashore (PINS). Though high water marks had not been specifically provided on PINS at the time of this writing, ground and aerial surveys suggested water levels above ground may have exceeded 4 feet above normally dry ground on portions of PINS in Kenedy County.  Levels up to 5.48 feet above normally dry ground at the shoreline (Mean Higher High Water) were noted along the Coastal Bend just north of Kenedy County at the north entrance to PINS. Though Hanna did not create any known new cuts into the Barrier Island of Kenedy County, visual evidence from ground and aerial post-storm surveys indicated eight rearranged washover channels from the combination of storm surge and breaking waves.  Most dunes were eroded to varying levels on the Kenedy portion of PINS.
Along Laguna Madre, tides ran out on northwest flow ahead of landfall, but rose sharply on strong southeast to south flow post-landfall. At the Texas Coastal Ocean Observation Network platform at Rincon del San Jose, near the land cut about one-third the distance north of Port Mansfield, return flow pushed water levels to an estimated 3.43 feet above Mean Sea Level (MSL; note:  an equivalent value based on the MHHW datum was not available) at 418 AM CST July 26th.  The high water levels - based on 2.5 feet or greater MSL as proxy, began at 8 PM CST July 25th and continued through 11 PM CST July 26th before slowly receding.
Other than severe beach erosion, there was little known property damage due to Storm Surge in largely unpopulated coastal Kenedy County. However, damage estimates to fishing huts and other coastal properties as calculated from NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts) was $11,866 for coastal Kenedy County.

Flash Flood in CAMERON, TEXAS
From 25-JUL-20 21:30:00 to 26-JUL-20 16:00:00 (CST-6)
Location: SANTA ROSA
Flood cause: Heavy Rain
Property damage: 13.27M
Crop damage: 27.10M
Reported by: Emergency Manager

Afternoon and early evening rains of 2 to 3 inches fell across the IH-2 corridor of Cameron County, from La Feria to east of Harlingen, and saturated soils ahead of the torrential rains that were to come later in the evening as the southern and eastern eyewall pulled copious tropical moisture into northern Cameron County after sunset.  Estimated rainfall of 4 to 6+ inches by mid evening began to produce known flash flooding in La Feria and Harlingen, with two water rescues conducted in La Feria just after 10 PM CST.  Despite lighter rains, flash flooding would continue due to poor drainage situations, especially in the La Feria/Santa Rosa area.  A broad south to north feeder band added another 2 to 4+ inches of rainfall to the storm totals during the pre-dawn hours, and light rains would continue to around noon in western Cameron County before ending.  Note:  Estimated flood-related public assistance property damage is provided in this episode.  However, the total damage would also include another 3 to 5 inches that would fall in an unrelated tropical band of torrential rain during the evening of July 27th.
Flooding would decimate the cotton (lint) crop and other unharvested dryland crops to an estimated value of $27.1 million.  Public assistance property damage as of this writing from flooding rainfall was estimated to be at $3.3 million. Additional public and individual assistance dollar damages, as well as insured damages, from flood waters was calculated using NCEI's total dollar damage estimate (divided among the affected counties by local storm data experts). Total property damage from flood waters for Cameron County was $9.968 million.

Flood in CAMERON, TEXAS
From 26-JUL-20 16:00:00 to 31-JUL-20 23:59:00 (CST-6)
Location: LA FERIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

High standing water due to a total of 7 to 12 inches of rainfall that fell directly from Hurricane/Tropical Storm Hanna from late on July 25th through early afternoon on July 26th continued to close roads and stand in neighborhoods, fields, and ditches through the end of July in western Cameron County, from the Cameron/Hidalgo and Cameron/Willacy County lines through the west side of Harlingen. An additional 2 to 5 inches fell during the late afternoon and early evening of July 27th from an unrelated tropical rain band, leaving total rainfall of 10 to 15 inches in the area.
A combination of the heavy rain with known drainage capacity issues in the form of pumps, pipes, and retention kept water levels ranging from 18 inches to four feet deep on at least a dozen roads, including portions of SR 107 around Santa Rosa as well as along Farm-to-Market Road 506  between La Feria and Santa Rosa, continuing north to near the Willacy County line and east to near Primera and Palm Valley.  Fields saw similar water levels, and low lying neighborhoods had high water near homes, with spot-built farm homes seeing some water inside.  Santa Rosa to La Feria had similar high water for a third straight summer.

Another round of heavy rainfall of 1 to 4 inches arrived during the evening of August 1st, prolonging the high water for a few more days into the following month, before dry weather arrived and allowed all water to recede.
Note:  Public Assistance (which includes damage to roads and bridges) and Crop damage is listed on the Flash Flood event in western Cameron County for brevity. Individual assistance and insured damage estimated from the National Flood Insurance Program of FEMA, which was estimated at nearly $10 million, was added to the flash flood entry for Cameron County for brevity, as mentioned above.

Tropical Storm in BROOKS, TEXAS
From 25-JUL-20 19:00:00 to 26-JUL-20 00:00:00 (CST-6)
Reported by: NWS Storm Survey

The slowly weakening inner eyewall of Hurricane Hanna slid across southern and central Brooks County during the evening of July 25th, producing peak sustained winds (though incomplete) of 34 mph with a peak gust of 53 mph at the Brooks County Airport east of Falfurrias. Stronger winds, likely sustained at 40 to 45 mph with estimated gusts to 55 or 60 mph, were likely over the southern third of the county which experienced the more persistent rains and wind in the eyewall.  A storm survey conducted in southern Brooks County found dozens of large tree limbs down, but no significant structural damage, near Encino.

Storm Surge/Tide in COASTAL WILLACY, TEXAS
From 26-JUL-20 10:00:00 to 26-JUL-20 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Along Laguna Madre in northern coastal Willacy County, the approach of Hurricane Hanna just 15 miles north of the county line produced strong outbound tide on strong northwest winds. As the eye moved onshore and passed the longitude of Laguna Madre, winds quickly shifted to the south with strong tropical storm force gusts, and waters rose rapidly.  Peak tide (2.62 feet above Mean Sea Level) occurred at Port Mansfield at 1136 AM CST July 26th.  Based on these conditions, as well as survey results that showed return water about 25 yards into marsh grass along Laguna Madre in Port Mansfield, it was possible that 3 feet of water above normally high ground occurred at some point between 10 AM CST and 6 PM CST on July 26th, all associated with the backside circulation around Hanna, which had weakened to a tropical storm (but still with a large envelope) in northeast Mexico.
Other than flattened marsh grass, no visible property damage was seen due to surge water in the town of Port Mansfield based on an NWS storm survey conducted on July 27th.

Flood in CAMERON, TEXAS
From 26-JUL-20 04:00:00 to 26-JUL-20 08:00:00 (CST-6)
Location: PORTWAY ACRES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Trusted reports from Facebook indicated 1 to 2 feet of standing water in some neighborhood streets in Los Fresnos during a period of outer south to north moving feeder bands well east of the center of Tropical Storm Hanna which was moving into northern Mexico south of Starr County at around the same time.  An estimated 3 to 5 inches additional rainfall fell during this period, with measured and estimated storm totals of 6 to 9 inches in southeastern Cameron County.  No significant flooding was reported, and any property damage was unknown.
Some of the cotton crop (lint, or bolls) and perhaps other crop was flattened by the torrential rains in fields between San Benito and Bayview.  Exact dollar damage estimates for these fields was unknown; an estimated total is provided in the Flash Flood Entry for this episode in Cameron County.

Hurricane (Typhoon) in INLAND KENEDY COUNTY, TEXAS
From 25-JUL-20 13:15:00 to 25-JUL-20 22:00:00 (CST-6)
Crop damage: 100.00K
Reported by: Buoy

Hurricane Hanna moved across the western Gulf of Mexico and made landfall on the mid-Kenedy County coastline at around 5 PM Central Time Saturday, July 25th, carrying sustained 90 mph winds with gusts over 100 mph in a small portion of the inner eye wall. While there aren't many observations in Kenedy County during this event, Buoy RSJT2 is just off the coastline in the Laguna Madre that borders this county and can be used as a reasonable proxy. Peak winds reached 71 mph with a gust to 103 mph. With observations from RSJT2, along with radar analysis, it is reasonable to assume that portions of Kenedy County experienced hurricane-force winds around 14:00 CST to 16:30 CST. At this time, impacts/loss to livestock costs are unknown for this area.
An NWS employee and a national storm chaser each reported hundreds of trees and large limbs blown down along U.S. 77 in central/west central Kenedy County immediately after and during the week following the hurricane. It was unknown what type of damage was done to ranch buildings across the county.

Hurricane (Typhoon) in COASTAL KENEDY COUNTY, TEXAS
From 25-JUL-20 13:15:00 to 25-JUL-20 20:00:00 (CST-6)
Reported by: Buoy

Hurricane Hanna moved across the western Gulf of Mexico and made landfall on the mid-Kenedy County coastline at around 5 PM Central Time Saturday, July 25th, carrying sustained 90 mph winds with gusts over 100 mph in a small portion of the inner eye wall. While there aren't many observations in Kenedy County during this event, Buoy RSJT2 is just off the coastline in the Laguna Madre that borders this county and can be used as a reasonable proxy. Peak winds reached 71 mph with a gust to 103 mph. With observations from RSJT2, along with radar analysis, it is reasonable to assume that Kenedy County experienced hurricane-force winds around 14:00 CST to 16:30 CST. At this time, sustained property and crop damage costs are unknown for this area.

Tropical Storm in COASTAL CAMERON, TEXAS
From 25-JUL-20 14:45:00 to 26-JUL-20 03:30:00 (CST-6)
Property damage: 0.00K
Reported by: ASOS

Intermittent Tropical Storm-force winds affected coastal Cameron County from late afternoon on July 25th until the pre-dawn hours of July 26th.  Strongest winds occurred in two segments: First, during the initial approach of the southwestern edge of the eyewall between mid afternoon and early evening on the 25th, then again overnight to just before daybreak on the 26th in strong southeasterly feeder bands that pushed gusts  to 55 mph. Peak sustained winds reached 46 mph at 252 AM CST with a peak gust of 55 mph occurring at 253 AM CST. Gusts over 50 mph also occurred during the afternoon in the southwest eyewall.
Crop damage in the coastal portion of Cameron County was included with the total for Cameron County overall, listed in the Cameron entry.  Property damage was limited in coastal Cameron County as strongest winds favored the northern portion, where population is much less and infrastructure tends to be better built. Details were not available as of this writing.