Active Weather Alerts
Flood Warning
Issued: 4:07 PM Aug. 23, 2025 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL 315 PM EDT THIS AFTERNOON... * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of southeast South Carolina, including the following county, Charleston. * WHEN...Until 315 PM EDT. * IMPACTS...Numerous roads remain closed due to flooding. It will take several hours for all the water from these storms to work through local drainage systems in urban areas. * ADDITIONAL DETAILS... - At 1206 PM EDT, emergency management reported heavy rain in the warned area due to thunderstorms. Flooding is ongoing or expected to begin shortly. Between 3 and 6 inches of rain have fallen. - Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flooding may begin to occur along Church Creek in West Ashley as river levels approach minor flood stage, areas near the river should remain aware of river levels. - Some locations that will experience flooding include... North Charleston, West Ashley, Downtown Charleston, James Island, Johns Island, Maybank Bridge, Charles Towne Landing, James Island County Park and Charleston Naval Complex. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. &&
Coastal Flood Advisory
Issued: 3:02 PM Aug. 23, 2025 – National Weather Service
...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 PM TO 11 PM EDT THIS EVENING... * WHAT...Up to one foot of inundation above ground level expected along shorelines and tidal waterways (7.7 to 7.9 feet Mean Lower Low Water at Charleston). * WHERE...Coastal Colleton and Charleston Counties. * WHEN...From 7 PM to 11 PM EDT this evening. * IMPACTS...This will result in some roads becoming impassable and minor flooding of properties. * ADDITIONAL DETAILS...High tide will occur around 9:04 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 -------- --------- --------- --------- ------- -------- 23/09 AM 7.4 1.6 1.9 N/A Minor 23/09 PM 7.8 2.0 1.7 N/A Moderate 24/09 AM 6.9 1.1 1.4 N/A None 24/10 PM 6.8 1.0 0.9 N/A None 25/10 AM 6.2 0.4 0.6 N/A None 25/10 PM 6.3 0.5 0.6 N/A None &&
Flood Watch
Issued: 11:25 AM Aug. 23, 2025 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of southeast Georgia, including the following areas, Bulloch, Candler, Coastal Bryan, Coastal Chatham, Coastal Liberty, Coastal McIntosh, Effingham, Evans, Inland Bryan, Inland Chatham, Inland Liberty, Inland McIntosh, Jenkins, Long, Screven and Tattnall and southeast South Carolina, including the following areas, Allendale, Beaufort, Charleston, Coastal Colleton, Coastal Jasper, Dorchester, Hampton, Inland Berkeley, Inland Colleton, Inland Jasper and Tidal Berkeley. * WHEN...Through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - Showers and thunderstorms produced numerous areas of 3 to 5 inches, with localized areas receiving in excess of 7 inches, of rainfall on Friday across southeast Georgia and the South Carolina. An additional 1.5 to 2.5 inches of rainfall can be expected across the region through this evening. The heaviest rainfall should occur generally along and east of the Interstate 95 corridor, some areas possibly receiving in excess of 4 inches. The additional rainfall falling on nearly saturated soil will likely lead to rapid runoff, possibly producing flash flooding. Several streams and creeks have elevated water levels following the heavy rainfall that occurred on Friday. Based on the forecast rainfall, Church Creek near West Ashley, French Quarter Creek near Huger, and Ireland Creek at Walterboro could see water levels crest above flood stage. In addition, flash flooding may develop within coastal cities with any heavy downpours that coincide with high tide this morning or this evening. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared to protect life and property, especially in areas prone to flooding. If flooding develops, move to higher ground immediately. If driving, be prepared for flooded roadways and possible road closures. &&
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