Irma first developed into a tropical storm on August 30th about 420 miles west of the Cabo Verde Islands, and within 24 hours strengthened into a hurricane.  Irma continued to intensify and became a major hurricane over the eastern Atlantic on September 1st.  After undergoing a brief period of weakening on September 2nd, Irma once again strengthened into a major hurricane on September 3rd and maintained major hurricane status through September 10th when it made landfall on the southwest Florida coast.  During this extended period as a major hurricane, Irma set numerous intensity records for a hurricane in the Atlantic basin.  Maximum sustained winds reached 185 mph, making Irma the strongest storm on record to exist in the Atlantic Ocean outside of the Caribbean and Gulf of Mexico.  Also, Irma���s 185 mph maximum sustained winds are tied for the second strongest maximum winds all time in an Atlantic hurricane.  The minimum central pressure reached during Irma���s life cycle was 914 mb which is the lowest pressure on record by an Atlantic hurricane outside of the western Caribbean and Gulf of Mexico.  Furthermore, Irma maintained Category 5 status for 3 consecutive days which is the longest on record for an Atlantic hurricane.  Irma stayed on a general westward track through September 5th when it began a gradual turn to the west-northwest.  On this west-northwestward track, Irma eventually skirted along the north coast of Cuba on September 9th before turning northward toward Florida on September 10th.  Irma officially made landfall at Marco Island, FL at 3:35 pm September 10 as a Category 3 hurricane.  Following landfall, Irma tracked to the north-northwest and eventually the northwest as it progressed up the western side of the Florida peninsula.  Irma steadily weakened during this time and was downgraded to a tropical storm near the big bend of Florida at 8:00 am on September 11th.  Through the rest of September 11th, Irma tracked to the northwest into southern Georgia and widespread impacts occurred across the Southeast.
Despite the fact that the center of Irma tracked well to the west of the southeast Georgia and southeast South Carolina region, it still caused significant impacts due to heavy rainfall, strong winds, tornadoes, and storm surge.  Feeder bands around Irma continuously moved onshore on September 11th and produced very heavy rainfall rates with rainfall totals generally ranging from 3 to 9 inches.  The peak storm total rainfall of 9.07��� was recorded by a CoCoRaHS observer near Beaufort, SC.  Daily record rainfall totals for September 11th were recorded at all 3 climate sites in the area: 5.51��� at the Charleston International Airport (KCHS), 4.53��� at Downtown Charleston (KCXM), and 4.74��� at the Savannah-Hilton Head International Airport (KSAV).  This widespread heavy rain resulted in several reports of flash flooding with water entering homes and businesses.  Wind damage produced numerous power outages across the region with some damage to structures and numerous downed trees.  The strongest winds were confined to coastal locations, but frequent gusts into the 40-50 mph range occurred well inland.  The maximum sustained wind recorded was 59 mph by the Weatherflow site on the Folly Beach Pier (XFOL) and the maximum wind gust recorded was 76 mph by the Weatherflow site near Beaufort (XBUF).  One fatality and 1 injury occurred from trees falling on homes and across roadways in southeast South Carolina.  The entire southeast Georgia and southeast South Carolina coast was impacted by storm surge generally ranging from 3 to 6 feet.  This storm surge produced numerous reports of 4 to 6 feet of inundation above ground level, mainly along the southeast South Carolina coast.  A peak surge of 4.87 feet occurred at the Charleston Harbor tide gauge at 2:00 pm while a peak surge of 5.63 feet occurred at the Fort Pulaski tide gauge at 5:42 am.  Significant beach erosion occurred at area beaches with widespread damage to docks and piers all along the coast, as well as numerous reports of inundated roadways.

Tropical Storm in CHARLESTON, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Charleston County Emergency Management reported numerous trees and power lines down across the county due to strong winds associated with Tropical Storm Irma.  One large live oak tree fell on a house and a vehicle on Gulf Drive in Mount Pleasant.  Also, strong winds caused severe roof damage to a home on Sullivan's Island.  The ASOS site at the Charleston International Airport (KCHS) measured peak sustained winds of 43 mph and a peak wind gust of 60 mph.  The AWOS site at the Charleston Executive Airport on Johns Island (KJZI) measured peak sustained winds of 40 mph and a peak wind gust of 59 mph.  The Weatherflow site at the Folly Beach pier measured peak sustained winds of 59 mph and a peak wind gust of 72 mph.  The Weatherflow site at the Isle of Palms pier measured peak sustained winds of 56 mph and a peak wind gust of 68 mph.  The Weatherflow site at Station 28.5 on Sullivan's Island measured peak sustained winds of 53 mph and a peak wind gust of 68 mph.  The Weatherflow site near Charleston at Batter Point measured peak sustained winds of 48 mph and a peak wind gust of 66 mph.  The National Weather Service official observation site near Waterfront Park in Downtown Charleston measured peak sustained winds of 40 mph and a peak wind gust of 52 mph.  The National Ocean Service tide gauge in Downtown Charleston measured peak sustained winds of 48 mph and a peak wind gust of 61 mph.  The National Ocean Service C-MAN site at the north end of Folly Beach measured peak sustained winds of 48 mph and a peak wind gust of 56 mph.  Finally, the RAWS site in the Ace Basin measured a peak wind gust of 53 mph.

Storm Surge/Tide in CHARLESTON, SOUTH CAROLINA
From 11-SEP-17 09:00:00 to 11-SEP-17 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Charleston County Emergency Management and a National Weather Service storm survey team confirmed widespread significant impacts due to storm surge associated with Tropical Storm Irma.  Storm surge impacted Downtown Charleston and surrounding areas within the tidal zone.  In Downtown Charleston, numerous media accounts showed sea water breaching the wall along the battery with several feet of inundation in White Point Gardens.  The inundation due to storm surge and heavy rainfall became so widespread that the Charleston Police Department closed the peninsula to travel during the event.  Other areas impacted include Schooner Road, Galleon Road, and Seaward Drive on James Island where extensive dock damage occurred.  A National Weather Service storm survey team estimated 4 to 5 feet of inundation along the west bank of the Stono River near Abbapoola Creek where extensive dock damage also occurred.  At the Wappoo Cut boat ramp, Highway 17 on both sides of the Ashley River bridge , Ripley Light Marina, and Lockwood Drive north and south of the James Island Expressway were flooded.  Even further inland, River Road was closed near where it intersects with Main Road on Johns Island.  Based on analysis of data from the USGS Storm Tide Sensor Network, inundation across the county ranged from 1 to almost 6 feet above ground level.  The peak inundation level surveyed was 5.89 feet above ground level on Eagle Point Road on Kiawah Island.  Widespread significant erosion and dune destruction occurred as a result of storm surge at beaches across the county including Kiaway Island, Folly Beach, Sullivan's Island, and Isle of Palms.  The National Ocean Service tide gauge in Charleston Harbor measured a peak tide level of 9.92 feet Mean Lower Low Water (MLLW) or 4.15 feet Mean Higher High Water (MHHW). This tide value ranks as the 3rd highest on record for the Charleston Harbor gauge and the peak surge value measured during the event was 4.87 feet.

Flash Flood in DORCHESTER, SOUTH CAROLINA
From 11-SEP-17 14:00:00 to 11-SEP-17 23:00:00 (EST-5)
Location: SLANDSVILLE
Flood cause: Heavy Rain / Tropical System
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Dorchester County Emergency Management reported that water entered at least 31 homes due to flash flooding along Eagle Creek.  This included homes on Tranquil Lane and Harrison Road in the Tranquil Acres/Estates neighborhood, as well as homes in the Summerwood subdivision off of Ladson Road.  Of the 31 impacted structures, 18 had 12 inches or less of water, 10 had between 13 and 23 inches of water, and 3 had between 24 and 35 inches of water inside.

Tropical Storm in COASTAL JASPER, SOUTH CAROLINA
From 11-SEP-17 06:00:00 to 11-SEP-17 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Jasper County Emergency Management reported multiple trees down across the county due to strong winds associated with Hurricane Irma.

Tropical Storm in BEAUFORT, SOUTH CAROLINA
From 11-SEP-17 07:00:00 to 11-SEP-17 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Beaufort County Emergency Management reported numerous trees and power lines down across the county due to strong winds associated with Hurricane Irma.  On Lady's Island, strong winds damaged airport hangars and other airport infrastructure.  The Weatherflow site at Pritchards Island near Beaufort measured peak sustained winds of 56 mph and a peak wind gust of 76 mph.  The AWOS at the Beaufort County Airport (KARW) measured peak sustained winds of 40 mph and a peak wind gust of 59 mph.  The ASOS at the Beaufort Marine Corps Air Station measured peak sustained winds of 30 mph and a peak wind gust of 61 mph.

Storm Surge/Tide in BEAUFORT, SOUTH CAROLINA
From 11-SEP-17 09:00:00 to 11-SEP-17 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Beaufort County Emergency Management reported that widespread significant impacts occurred across the county due to storm surge associated with Tropical Storm Irma.  Extensive storm surge related damage occurred across Hunting Island State Park.  On Fripp Island at Ocean Point the sea wall was breached and beach front homes were inundated and extensive flooding was observed on the northern half of the island.  Homes along Highway 21 were flooded, and South Carolina DOT reported that the Harbor River flooded over Highway 21 at Cougar Drive on Lady's Island.  Other homes were flooded in the Carolina Shores neighborhood and across the northeast end of Port Royal Island near and near the Marine Corps Air Station.  Highway 17 near the Pocotaligo River flooded and was closed for several hours.  Also, Highway 170 was flooded near Callawassie Island.  Other flooded areas due to storm surge include the south end of Hilton Head Island, Sea Pines Plantation, Long Cove Club, and Harbor Town Links clubhouse.  Prior to the event, the USGS deployed its Storm Tide Sensor Network and analysis of the data showed that storm surge related inundation ranged from 1.67-6.04 feet above ground level in the hardest hit areas.  Some of the more notable values include 6.04 feet at the Colleton River at the end of JW Mariculture Road, 5.21 feet near Harbor Town, and 5.21 feet at Sea Island Parkway between Hunting Island State Park and Fripp Island.

Tropical Depression in JASPER, SOUTH CAROLINA
From 11-SEP-17 06:00:00 to 11-SEP-17 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Jasper County Emergency Management reported multiple trees down across the county due to strong winds associated with Hurricane Irma.  One 87 year old male died 10 days after his car ran into a tree that had fallen across Highway 278 near Yemassee.

Tornado in CHARLESTON, SOUTH CAROLINA
From 11-SEP-17 13:48:00 to 11-SEP-17 13:50:00 (EST-5)
Location: (CHS)CHARLESTON AFB
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey team confirmed an EF0 toranado on Joint Base Charleston in Charleston County.  The weak, short-lived tornado, associated with the outer rain bands of Tropical Storm Irma, touched down near the Joint Base Charleston flight line and traveled along a discontinuous path toward the north-northwest.  The tornado pushed back the edge of the roof on the control tower, damaged fascia of a nearby building near the flight line, and damaged the roof of another metal building on the base.  Farther northwest on the Wrenwoods Golf Course, the tornado blew down two large oak trees and snapped large branches of other trees.  The tornado then dissipated just beyond the north side of the golf course, about 2 minutes after touchdown.

Tornado in CHARLESTON, SOUTH CAROLINA
From 11-SEP-17 17:19:00 to 11-SEP-17 17:21:00 (EST-5)
Location: JAMES IS
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey team confirmed an EF0 tornado on James Island.  The weak, short-lived tornado, associated with an outer rainband of Tropical Storm Irma, touched won in a marsh north of Schooner Creek and tracked north-northwest.  The tornado uprooted a live oak tree and damaged another tree at the edge of the marsh.  The tornado then damaged a residence on the southeast side of Seaward Drive, blowing of part of the southeast and northwest facing roof.  The tornado then crossed Seaward Drive, damaging another tree and blowing 4 shutters off the southeast facing side of a residence on Lynne Avenue.  Debris carried from the Seaward Drive  residence also damaged a soffit on the Lynne Avenue home.  The tornado then lifted south of Parrot Point Creek.

Tornado in CHARLESTON, SOUTH CAROLINA
From 11-SEP-17 18:13:00 to 11-SEP-17 18:15:00 (EST-5)
Location: THE GROVES
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey team confirmed an EF0 tornado in Mount Pleasant.  The weak, short-lived tornado, associated with an outer rainband of Tropical Storm Irma,  formed over the marsh area between Mount Pleasant and Sullivan's Island.  The weak tornado first moved into the south end of Pine Island View Road, then moved quickly north-northwest over the eastern ends of Oak Landing Road and Green Path Lane, before dissipating back on Pine Island View Road.  Although no significant structural damage was observed, there were many large tree limbs down, some uprooted trees, and one wooden fence completely blown down.

Flash Flood in JASPER, SOUTH CAROLINA
From 11-SEP-17 13:30:00 to 11-SEP-17 16:00:00 (EST-5)
Location: OLD HOUSE
Flood cause: Heavy Rain / Tropical System
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Jasper County Emergency Management reported homes flooded and inaccessible on Cherry Hill Road near the intersection with Highway 462.  At least 1 person was stranded and in need of rescue.

Flash Flood in CHARLESTON, SOUTH CAROLINA
From 11-SEP-17 13:40:00 to 12-SEP-17 01:00:00 (EST-5)
Location: DRAYTON
Flood cause: Heavy Rain / Tropical System
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The Crosstowne Christian Church on Bees Ferry Road flooded with at least one foot of water reported inside.  Flooding occurred when Church Creek overflowed its banks in the afternoon.  A nearby river and rain gauge on Church Creek measured a nearly 5 foot rise in the creek level in response to 8.97 inches of storm total rainfall due to Tropical Storm Irma.  Winners Circle was also flooded and impassable along Church Creek on the other side of Bees Ferry Road.

Tropical Depression in INLAND BERKELEY, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Berkeley County Emergency Management reported scattered trees down across the county due to strong winds associated with Tropical Storm Irma.  Specifically, trees were down along Highway 52 at Tom Hill Road and Garbar Lane, as well as Highway 41 and Tiger Corner Road.  The AWOS site in Moncks Corner measured peak sustained winds of 28 mph and a peak wind gust of 41 mph.  The official National Weather Service observation at Pinopolis on Lake Moultrie measured a peak wind gust of 44 mph.

Tropical Depression in TIDAL BERKELEY, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Berkeley County Emergency Management reported scattered trees down across the county due to strong winds associated with Tropical Storm Irma.

Tropical Storm in SOUTHERN COLLETON, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Colleton County Emergency Management reported numerous trees and power lines down across the county due to strong winds associated with Tropical Storm Irma.  Many roads in and around around Edisto Island were impassable due to downed trees and power lines.

Storm Surge/Tide in SOUTHERN COLLETON, SOUTH CAROLINA
From 11-SEP-17 09:00:00 to 11-SEP-17 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey team toured portions of Edisto Island beach and confirmed significant storm surge caused flooding, damage to homes, and beach erosion.  The entire dune line along the beach was breached and washed away resulting in up to a foot of sand being deposited onto Palmetto Boulevard.  During the event one person attempted to evacuate the area in a vehicle, became stranded in sand and water on Palmetto Boulevard, and required rescue.  Numerous homes sustained damage from storm surge related inundation and wave action battering the structures.  Inundation was estimated to be as high as 6 feet above ground level, which was confirmed by the USGS Storm Tide Sensor Network.  One such sensor measured 6.2 feet of inundation above ground level on the back side of Edisto Island along Big Bay Creek near Buoy Road.

Storm Surge/Tide in TIDAL BERKELEY, SOUTH CAROLINA
From 11-SEP-17 10:00:00 to 11-SEP-17 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Berkeley County Emergency Management reported that Bushy Park Road at Bushy Park Boat Landing was impassable due to storm surge related flooding.  Also, the public reported that numerous docks were damaged on the north side of the Wando River.

Storm Surge/Tide in INLAND BERKELEY, SOUTH CAROLINA
From 11-SEP-17 10:00:00 to 11-SEP-17 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported that storm surge caused damage to numerous docks on the north side of the Wando River.

Tornado in CHARLESTON, SOUTH CAROLINA
From 11-SEP-17 16:45:00 to 11-SEP-17 16:47:00 (EST-5)
Location: CHARLESTON JOHNS ARP
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey team confirmed an EF1 tornado in Legare Farms on Johns Island.  The tornado touched down along the west bank of the Stono River near the junction of Abbapoola Creek.  The tornado initially traveled north-northwest near the Stono River, destroying a shed, snapping a large live oak tree at the trunk, and damaging several other trees.  In this area, the tornado also pulled from the ground a well pump and cement anchors for a chain link fence.  The tornado then knocked a home off pilings, and the displaced residence incurred significant roof damage and crushed a pickup truck which was parked under the damaged house.  The tornado then turned toward the north and northeast, damaging multiple trees before lifting along the west bank of the Stono River.

Tropical Depression in HAMPTON, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hampton County Emergency Management reported numerous trees down across the county due to strong winds associated with Tropical Storm Irma. A Natural Resources Conservation Service (NRCS) observation site located at Youmans Farm near Furman measured a peak wind gust of 40 mph during the event.

Tropical Depression in DORCHESTER, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Dorchester County Emergency Management reported multiple trees down across the county due to strong winds associated with Tropical Storm Irma.  Several structures received significant damage from falling trees and one person was injured in Ladson when a large tree fell on a residence on Monroe Road.  Multiple roads were blocked by downed trees and power lines during the event.  Also, numerous roads across the county were closed due to high water from heavy rainfall.

Tropical Depression in ALLENDALE, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Allendale County Emergency Management reported multiple trees down across the county due to strong winds associated with Tropical Storm Irma.  Also, one lane of Highway 321 was closed due to high water near Fairfax.

Tropical Depression in NORTHERN COLLETON, SOUTH CAROLINA
From 11-SEP-17 08:00:00 to 11-SEP-17 20:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Colleton County Emergency Management reported numerous trees and power lines down due to strong winds associated with Tropical Storm Irma.  The AWOS site in Walterboro measured peak sustained winds of 32 mph and a peak wind gust of 48 mph.  Also, numerous roads in and around Walterboro were flooded.