South Carolina, 2025

Flash Flooding in South Carolina, August 16, 2025

August 16, 2025 · NWS CAE · 5 events in 3 counties and zones

Thunderstorms developed in a highly unstable environment along a lingering boundary from a MCS that moved through the night before. Weak flow led to slow moving storms, propagating slowly along an outflow boundary.

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

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
5

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 CAE wrote it up.

Thunderstorms developed in a highly unstable environment along a lingering boundary from a MCS that moved through the night before. Weak flow led to slow moving storms, propagating slowly along an outflow boundary. With precipitable water exceeding 2 inches and high soil moisture, this led to flash flooding near the Savannah River.

The radar

The Columbia radar (KCAE), 77 km away, was scanning. The volume nearest the first event began at 17:27 UTC.

Open the radar archive at this moment

Event by event

5 flash flood. Local standard time, as filed.

Flash Flood, Aiken

When
August 16, 12:30 PM EST to 1:30 PM EST
Where
Aiken County, 2.19 mi SSE of Stiefeltown to 2.07 mi SSE of Stiefeltown
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
33.523, -81.781

Aiken County Emergency Manager reported flash flooding on Howlandville Rd near Pine Log Rd.

Flash Flood, Aiken

When
August 16, 12:30 PM EST to 1:30 PM EST
Where
Aiken County, 1.16 mi ENE of Langley to 1.12 mi WNW of Gloverville
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
33.526, -81.851

Aiken County Emergency Manager reported flash flooding near the intersection of Langley Dam Rd and Jefferson Davis Hwy.

Flash Flood, Edgefield

When
August 16, 1:15 PM EST to 2:00 PM EST
Where
Edgefield County, 2.04 mi S of Pinehouse Xrds to 1.58 mi SSE of Pinehouse Xrds
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
33.701, -81.843

Edgefield County Emergency Manager reported portions of Windy Ridge Rd were closed due to flash flooding.

Flash Flood, McCormick

When
August 16, 1:15 PM EST to 2:15 PM EST
Where
McCormick County, 1.77 mi N of Modoc to 1.57 mi N of Modoc
Cause
Heavy Rain
Reported by
911 Call Center
Coordinates
33.755, -82.203

McCormick County Dispatch reported a portion of US 221 near State Park Rd was closed due to flash flooding.

Flash Flood, McCormick

When
August 16, 1:40 PM EST to 2:10 PM EST
Where
McCormick County, 9.02 mi E of Mc Cormick to 9.06 mi E of Mc Cormick
Cause
Heavy Rain
Reported by
911 Call Center
Coordinates
33.940, -82.125

McCormick County dispatch reported a portion of Callison Hwy near Upper Mill Rd was closed due to flash flooding.

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.

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: 1279249, 1279255, 1279282, 1279297, 1279294.