Active Weather Alerts
Coastal Flood Advisory
Issued: 9:22 PM Jul. 22, 2025 – National Weather Service
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Up to one half foot of inundation above ground level along shorelines and tidal waterways (7.0 to 7.2 feet Mean Lower Low Water at Charleston). * WHERE...Coastal Colleton and Charleston Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...This could result in some roads becoming impassable. * ADDITIONAL DETAILS...High tide will occur around 6:57 PM today at Charleston. Saltwater inundation will be possible 1 to 2 hours before and after high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Visit water.weather.gov for additional water level and flood impact information. && Time of high total tides are approximate to the nearest hour. Charleston Harbor SC MLLW Categories - Minor 7.0 ft, Moderate 7.5 ft, Major 8.0 ft MHHW Categories - Minor 1.2 ft, Moderate 1.7 ft, Major 2.2 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 22/07 PM 7.1 1.3 0.8 N/A Minor 23/07 AM 5.6 -0.2 0.8 N/A None 23/08 PM 6.9 1.1 0.6 N/A None 24/08 AM 5.3 -0.5 0.4 N/A None 24/09 PM 6.6 0.8 0.4 N/A None 25/09 AM 5.3 -0.5 0.3 N/A None &&
Flood Advisory
Issued: 7:43 PM Jul. 22, 2025 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 645 PM EDT THIS EVENING... * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of southeast South Carolina, including the following counties, Charleston and Colleton. * WHEN...Until 645 PM EDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 343 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Up to 0.5 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1.5 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Edisto Beach, Johns Island, West Ashley, James Island, Hollywood, Folly Beach, Ravenel, Seabrook Island, Kiawah Island and Meggett. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. &&
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