National Weather Service United States Department of Commerce

GOES satellite (left), radar, (right-top) and track (right-bottom) imagery of Irma




Hurricane Irma made landfall in the Florida Keys as a Category 4 hurricane and then along the southwest coast of Florida as a Category 3 hurricane. The storm then moved north over the Florida peninsula while weakening to a tropical storm before moving into Georgia and continuing to weaken. Click here for a surface weather map from the Weather Prediction Center at 1200 UTC (8 AM EDT) on September 11 showing Tropical Storm Irma over northern Florida. The storm brought significant storm surge inundation and wind gusts near hurricane-force to coastal areas of southeast Georgia and southeast South Carolina as well as several tornadoes, flooding rainfall and river flooding. For more details on impacts to the area check out our Post-Storm Report.



Click on image to enlarge



Click on images to enlarge; State-wide rainfall maps: GA and SC


Storm Surge/Inundation

Preliminarily, the maximum storm tide (astronomical tide + storm surge) was 12.24 feet Mean Lower Low Water (MLLW) / 4.73 feet Mean Higher High Water (MHHW) at 1742 UTC (142 PM EDT) on September 11 at Fort Pulaski, GA, which was the second highest level ever recorded. The peak storm tide in Charleston Harbor was 9.92 feet MLLW / 4.15 feet MHHW at 1718 UTC (118 PM EDT), which is the third highest on record. The greatest storm surge (storm tide minus the astronomical tide) at Fort Pulaski and Charleston was 5.63 feet and 4.87 feet, respectively, although these did not occur at the same times as the highest storm tides. Click here for a map of the highest water levels recorded for many other areas along the U.S. East Coast. NOAA tide level data can be found here. Water level data collected by the USGS can be found here.

Click on images to enlarge

Charleston Harbor Tide Gauge

Charleston Harbor Tide Gauge

Fort Pulaski Tide Gauge

Fort Pulaski Tide Gauge



Four tornadoes have been confirmed in Charleston county associated with Tropical Storm Irma - three with a rating of EF-0 and one EF-1. Click here for the full summary.



Damage Photos

Courtesy of NWS Charleston, SC; click on images to enlarge

Edisto Beach, SC
Tybee Island, GA


Additional Information