South Carolina, 2025

Flash Flooding and Flood in South Carolina, August 23, 2025

August 23, 2025 · NWS CHS · 14 events in 2 counties and zones

Mid-level energy tracking across the region along with a deep moisture and modest instability residing near a stalled front led to an environment supportive of heavy rainfall across Southeast South Carolina.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
14

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS CHS wrote it up.

Mid-level energy tracking across the region along with a deep moisture and modest instability residing near a stalled front led to an environment supportive of heavy rainfall across Southeast South Carolina.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, SC wrote its last area forecast discussion before the first event at Aug 23, 6:41 AM EST, 15 minutes earlier.

Area forecast discussion, Aug 23, 6:41 AM EST, 15 minutes before
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Hazardous weather outlook, Aug 23, 6:31 AM EST, 25 minutes before
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In the hours before

Local storm report, Aug 23, 5:27 AM EST, 1 hour 29 minutes before
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The radar

The Charleston,SC radar (KCLX), 104 km away, was scanning. The volume nearest the first event began at 11:56 UTC.

Open the radar archive at this moment

Event by event

13 flash flood, 1 flood. Local standard time, as filed.

Flash Flood, Charleston

When
August 23, 6:56 AM EST to 7:26 AM EST
Where
Charleston County, 0.13 mi ESE of Citadel to 0.03 mi E of Citadel
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.799, -79.948

Law enforcement reported the intersection of King Street and Huger Street closed due to high water.

Flash Flood, Charleston

When
August 23, 7:03 AM EST to 7:33 AM EST
Where
Charleston County, 0.86 mi WNW of Charleston to 0.89 mi WNW of Charleston
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.785, -79.944

Law enforcement reported the intersection of Ogier Street and Calhoun Street closed due to flooding.

Flash Flood, Charleston

When
August 23, 7:25 AM EST to 7:55 AM EST
Where
Charleston County, 0.54 mi SSW of Citadel to 0.6 mi SW of Citadel
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.793, -79.954

Law enforcement reported Hagood Avenue and Fishburne Street closed due to high water.

Flash Flood, Charleston

When
August 23, 7:32 AM EST to 7:52 AM EST
Where
Charleston County, 0.52 mi NNE of Citadel to 0.56 mi NNE of Citadel
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.807, -79.947

Law enforcement reported the intersection of North Nassau Street and Romney Street closed due to flooding.

Flash Flood, Charleston

When
August 23, 7:45 AM EST to 8:15 AM EST
Where
Charleston County, 0.94 mi WNW of Charleston to 0.8 mi WNW of Charleston
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.784, -79.945

Law enforcement reported Ashley Avenue closed between Calhoun Street and Bull Street due to rainfall around high tide.

Flash Flood, Charleston

When
August 23, 8:09 AM EST to 8:39 AM EST
Where
Charleston County, 1.22 mi ENE of Croghan to 0.98 mi W of Charleston
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.779, -79.952

Law enforcement reported the intersection of Lockwood Drive and Broad Street closed due to flooding.

Flash Flood, Charleston

When
August 23, 8:10 AM EST to 8:40 AM EST
Where
Charleston County, 0.63 mi NNE of Citadel to 0.67 mi NE of Citadel
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.808, -79.944

Law enforcement reported the intersection of Morrison Drive and Romney Street closed due to flooding.

Flash Flood, Charleston

When
August 23, 8:10 AM EST to 8:40 AM EST
Where
Charleston County, 0.47 mi S of Citadel to 0.49 mi S of Citadel
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.793, -79.950

Law enforcement reported the intersection of Ashley Avenue and Fishburne Street closed due to rainfall around high tide.

Flash Flood, Charleston

When
August 23, 8:11 AM EST to 8:41 AM EST
Where
Charleston County, 0.97 mi W of Charleston to 0.98 mi W of Charleston
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.778, -79.947

Law enforcement reported the intersection of Barre Street and Montagu Street closed due to rainfall around high tide.

Flash Flood, Charleston

When
August 23, 8:12 AM EST to 8:42 AM EST
Where
Charleston County, 0.81 mi NW of Citadel to 0.79 mi NW of Citadel
Cause
Heavy Rain
Reported by
NWS Employee
Coordinates
32.809, -79.959

A National Weather Service employee reported the intersection of Peachtree Street and Hester Street closed due to rainfall around high tide.

Flash Flood, Charleston

When
August 23, 8:30 AM EST to 9:00 AM EST
Where
Charleston County, 0.61 mi NW of Citadel to 0.69 mi NNW of Citadel
Cause
Heavy Rain
Reported by
NWS Employee
Coordinates
32.807, -79.957

A National Weather Service employee reported the intersection of Maple Street and Ashley Avenue flooded due to rainfall around high tide.

Flash Flood, Charleston

When
August 23, 8:53 AM EST to 9:23 AM EST
Where
Charleston County, 3.11 mi SE of Morris Acres to 3.23 mi SE of Morris Acres
Cause
Heavy Rain
Reported by
Trained Spotter
Coordinates
32.720, -80.060

A trained weather spotter reported Walter Drive was flooded and impassable.

Flood, Colleton

When
August 23, 8:59 AM EST to 9:19 AM EST
Where
Colleton County, 1.39 mi NE of Edisto Beach to 1.38 mi NE of Edisto Beach
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
32.495, -80.314

A Colleton County emergency manager reported a septic tank out of the ground along Jungle Road due to heavy rainfall in the area.

Flash Flood, Charleston

When
August 23, 11:51 AM EST to 12:21 PM EST
Where
Charleston County, 3.87 mi SSW of Morris Acres to 3.72 mi SSW of Morris Acres
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.700, -80.130

Law enforcement reported a portion of Bears Bluff Road washed away near the split with Maybank Highway due to flowing water across the road.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in South Carolina in 2025Every state in 2025This day in weather historyWarnings in South Carolina, August 2025

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1293400, 1293404, 1293398, 1293411, 1293414, 1293413, 1293401, 1293417, 1293421, 1293422, 1293410, 1293405, 1293423, 1293412.