Alert archive / South Carolina / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 81, NWS Charleston, SC

August 22, 2026Beaufort County, Charleston County, Colleton County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Aug 22, 2026, 8:00 PM EDT for Beaufort County, Charleston County, Colleton County, South Carolina. It was in force for 60 min. 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 22, 2026, 8:00 PM EDT (00:00 UTC)
Expired
Aug 22, 2026, 9:00 PM EDT
In force
60 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon
Hail
0.0 in
Wind
60.0 mph

Counties Beaufort County, SC, Charleston County, SC, Colleton County, SC

The radar

The Charleston,SC radar (KCLX), 58 km from the middle of the area, began a volume at 00:03 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.0 hours before the alert went out and 384 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, Greensboro/Hi Pt, NC at 00:00Z on 2026-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1646 joules per kilogram.LCLEL10008507005003002001001 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, Greensboro/Hi Pt, NC at 00:00Z on 2026-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.19395878Sfc1 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
1646 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 22, 2:27 PM EDT, 5 hours 33 minutes earlier. Its key messages:

  • 1) Locally heavy rainfall is possible today with showers and storms.
Area forecast discussion, Aug 22, 2:27 PM EDT, 5 hours 33 minutes before
Area Forecast Discussion
National Weather Service Charleston SC
227 PM EDT Sat Aug 22 2026

.WHAT HAS CHANGED...
All sections updated.

&&

.KEY MESSAGES...
- 1) Locally heavy rainfall is possible today with showers and
  storms.

&&

.DISCUSSION...
KEY MESSAGE 1: Locally heavy rainfall is possible today with showers
and storms.

A large mid level trough, centered over the Great Lakes, will
dominate over the eastern CONUS today.. WPC surface analysis
from 15Z shows a weak front draped across the SC Midlands. This
front will be the main forcing behind showers and storms this
afternoon as it slowly moves towards the SC Lowcountry and SE
Georgia. While a strong storm cannot be ruled out, the main
hazard this afternoon will be heavy rainfall as PWATs are
analyzed around 1.9 to 2.0". The 12Z guidance depicts the bulk
of the precipitation developing around 22/23Z this evening,
generally along and east of I-95. The 12Z HREF shows
probabilities of 1 inch or greater east of I-95 around 50-70%.
Shower and storm activity is forecast to wind down by 9 PM.

Sunday Onward: The aforementioned upper trough will finally move
far enough east to usher in some drier air into the area by
Sunday into Monday. With drier air in place and the surface
boundary pushed offshore, rain chances should remain low through
Monday. However, moisture should begin to recover starting
Tuesday and into the middle of the week with a return to more
typical summertime pattern setting up.

&&

.AVIATION /18Z SATURDAY THROUGH THURSDAY/...
A TEMPO group has been introduced at KCHS/KJZI/KSAV to reflect
the threat for TSRA this afternoon. Thereafter, prevailing VFR
through the remainder of the 18Z TAFs.

Extended Aviation Outlook: Prevailing VFR.

&&

.MARINE...
Today through Thursday: Marine conditions are expected to remain
below Small Craft Advisory criteria through the period. A fairly
typical summertime pattern on tap. Generally expect south to
southwest winds averaging in the 10-15 knot range with gusts to 20
kt at times and seas 2 to 3 feet. Any showers or thunderstorms that
move over the waters have the potential to bring higher wind gusts
and frequent lightning.

&&

.CLIMATE...
Record High Minimum Temperatures:

August 24:
KCHS: 76/2010
KCXM: 80/1975

August 25:
KCHS: 77/1982

August 27:
KCHS: 78/2011

August 28:
KCHS: 77/2020

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.

&&

In the hours before

Special weather statement, Aug 22, 7:35 PM EDT, 25 minutes before
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Local storm report, Aug 22, 7:43 PM EDT, 17 minutes before
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Local storm report, Aug 22, 7:46 PM EDT, 14 minutes before
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Special weather statement, Aug 22, 7:52 PM EDT, 8 minutes before
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Local storm report, Aug 22, 7:55 PM EDT, 5 minutes before
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Local storm report, Aug 22, 7:56 PM EDT, 4 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 8:08 PM EDTSpecial Weather StatementCHSJasper52 min
Aug 22, 8:34 PM EDTSpecial Marine WarningCHS86 min
Aug 22, 8:42 PM EDTAreal Flood AdvisoryCHSBeaufort, Charleston, Colleton3 hr
Aug 22, 8:56 PM EDTSpecial Weather StatementCHSBeaufort49 min
Aug 22, 8:58 PM EDTSpecial Weather StatementCHSBeaufort32 min
Aug 22, 9:07 PM EDTSpecial Marine WarningCHS53 min
Aug 22, 9:30 PM EDTSpecial Weather StatementCHSBeaufort30 min
Aug 22, 9:59 PM EDTSpecial Marine WarningCHS2 hr
Aug 22, 10:15 PM EDTAreal Flood WarningCHSBerkeley, Charleston, Dorchester3 hr
Aug 23, 12:55 AM EDTSpecial Marine WarningCHS65 min
Aug 22, 8:16 PM EDTSpecial Weather StatementCHSEffingham29 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2026Every severe thunderstorm 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.