Alert archive / South Carolina / Flash Flood Warnings in 2026

Flash Flood Warning 24, NWS Columbia, SC

August 21, 2026Clarendon County, Orangeburg County, South Carolina

NWS Columbia, SC issued this flash flood warning at Aug 21, 2026, 7:13 PM EDT for Clarendon County, Orangeburg County, South Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 21, 2026, 7:13 PM EDT (23:13 UTC)
Expired
Aug 21, 2026, 9:48 PM EDT
In force
3 hr
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

Counties Clarendon County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 72 km from the middle of the area, began a volume at 23:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 11.2 hours before the alert went out and 87 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2026-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2194 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2026-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2194 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1114 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 21, 8:22 AM EDTSpecial Weather StatementCAEClarendon23 min
Aug 21, 8:46 AM EDTSpecial Weather StatementCAEClarendon29 min
Aug 21, 9:43 AM EDTSpecial Weather StatementCAEOrangeburg32 min
Aug 21, 10:02 AM EDTSpecial Weather StatementCAEOrangeburg28 min
Aug 21, 10:52 AM EDTSpecial Weather StatementCAECalhoun23 min
Aug 21, 1:46 PM EDTSpecial Weather StatementCAEAiken29 min
Aug 21, 1:54 PM EDTSpecial Weather StatementCAELee36 min
Aug 21, 2:07 PM EDTSevere Thunderstorm WarningCAEAiken, Lexington38 min
Aug 21, 2:19 PM EDTSpecial Weather StatementCAEMcCormick41 min
Aug 21, 2:28 PM EDTSevere Thunderstorm WarningCAEEdgefield, McCormick47 min
Aug 21, 2:29 PM EDTSpecial Weather StatementCAELexington31 min
Aug 21, 2:31 PM EDTSpecial Weather StatementCAEFlorence29 min
Aug 21, 2:42 PM EDTSevere Thunderstorm WarningCAEEdgefield, McCormick48 min
Aug 21, 2:45 PM EDTSpecial Weather StatementCAEAiken30 min
Aug 21, 3:01 PM EDTSevere Thunderstorm WarningCAELexington, Newberry, Richland, Saluda44 min
Aug 21, 3:05 PM EDTSevere Thunderstorm WarningCAEAiken, Edgefield, Saluda40 min
Aug 21, 3:09 PM EDTSevere Thunderstorm WarningCAEFairfield, Newberry, Richland51 min
Aug 21, 3:15 PM EDTSevere Thunderstorm WarningCAEEdgefield, Newberry, Saluda45 min
Aug 21, 3:29 PM EDTSevere Thunderstorm WarningCAEAiken, Edgefield, McCormick, Saluda46 min
Aug 21, 3:44 PM EDTSevere Thunderstorm Warning Considerable damage threatCAEFairfield, Lexington, Newberry, Richland, Saluda46 min
Aug 21, 3:48 PM EDTSevere Thunderstorm WarningCAELancaster42 min
Aug 21, 3:54 PM EDTSevere Thunderstorm WarningCAEFairfield, Newberry, Richland66 min
Aug 21, 4:09 PM EDTAreal Flood AdvisoryCAEFairfield, Newberry96 min
Aug 21, 4:16 PM EDTSevere Thunderstorm WarningCAEChesterfield44 min
Aug 21, 4:16 PM EDTSevere Thunderstorm WarningCAEFairfield, Kershaw, Lancaster44 min
Aug 21, 4:50 PM EDTAreal Flood AdvisoryCAEFairfield72 min
Aug 21, 4:57 PM EDTSevere Thunderstorm WarningCAEChesterfield, Lancaster48 min
Aug 21, 5:04 PM EDTSevere Thunderstorm WarningCAECalhoun, Richland, Sumter41 min
Aug 21, 5:06 PM EDTSevere Thunderstorm WarningCAEAiken, Barnwell39 min
Aug 21, 5:10 PM EDTAreal Flood AdvisoryCAEChesterfield3 hr
Aug 21, 5:13 PM EDTSpecial Weather StatementCAERichland47 min
Aug 21, 5:28 PM EDTSpecial Weather StatementCAEChesterfield, Lee47 min
Aug 21, 5:37 PM EDTSpecial Weather StatementCAESumter53 min
Aug 21, 5:44 PM EDTSpecial Weather StatementCAECalhoun46 min
Aug 21, 5:44 PM EDTSevere Thunderstorm WarningCAEBarnwell46 min
Aug 21, 6:01 PM EDTSevere Thunderstorm WarningCAEBamberg, Barnwell59 min
Aug 21, 6:06 PM EDTSevere Thunderstorm WarningCAECalhoun, Clarendon, Richland, Sumter54 min
Aug 21, 6:12 PM EDTSevere Thunderstorm WarningCAECalhoun, Clarendon, Orangeburg63 min
Aug 21, 6:24 PM EDTSevere Thunderstorm WarningCAEClarendon, Lee, Sumter66 min
Aug 21, 6:56 PM EDTAreal Flood AdvisoryCAEClarendon, Lee, Orangeburg, Sumter3 hr
Aug 21, 7:14 PM EDTSpecial Weather StatementCAEBamberg, Clarendon, Orangeburg61 min
Aug 21, 7:30 PM EDTAreal Flood AdvisoryCAEClarendon3 hr
Aug 20, 10:00 PM EDTSpecial Weather StatementCAEBurke45 min
Aug 21, 1:20 PM EDTSpecial Weather StatementCAERichmond25 min
Aug 21, 1:45 PM EDTSpecial Weather StatementCAERichmond30 min
Aug 21, 2:16 PM EDTSpecial Weather StatementCAERichmond29 min
Aug 21, 2:33 PM EDTAreal Flood AdvisoryCAERichmond3 hr

Nearby

Flash Flood Warnings in South Carolina, 2026Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.