Alert archive / South Carolina / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 227, NWS Greenville-Spartanburg, SC

August 12, 2026Anderson County, Greenville County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 12, 2026, 4:57 PM EDT for Anderson County, Greenville County, South Carolina. It was in force for 33 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 12, 2026, 4:57 PM EDT (20:57 UTC)
Expired: Aug 12, 2026, 5:30 PM EDT
In force: 33 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Anderson County, SC, Greenville County, SC

The radar

The Greer radar (KGSP), 33 km from the middle of the area, began a volume at 21:00 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, 9.0 hours before the alert went out and 306 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 148 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 1298 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 7:22 PM EDT, 21 hours 35 minutes earlier.

Area forecast discussion, Aug 11, 7:22 PM EDT, 21 hours 35 minutes before

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The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 11, 9:00 PM EDT	Special Weather Statement	GSP	Transylvania	45 min
Aug 11, 9:10 PM EDT	Special Weather Statement	GSP	Avery, Mitchell, Yancey	50 min
Aug 11, 9:34 PM EDT	Special Weather Statement	GSP	Haywood	56 min
Aug 11, 9:42 PM EDT	Special Weather Statement	GSP	Alexander, Iredell	48 min
Aug 11, 9:55 PM EDT	Special Weather Statement	GSP	Buncombe	50 min
Aug 11, 10:02 PM EDT	Special Weather Statement	GSP	Caldwell	43 min
Aug 11, 10:06 PM EDT	Special Weather Statement	GSP	Burke	39 min
Aug 11, 10:21 PM EDT	Special Weather Statement	GSP	Rowan	39 min
Aug 11, 10:37 PM EDT	Special Weather Statement	GSP	Swain	38 min
Aug 11, 10:48 PM EDT	Special Weather Statement	GSP	Henderson	42 min
Aug 11, 10:50 PM EDT	Special Weather Statement	GSP	Gaston, Lincoln	40 min
Aug 11, 10:54 PM EDT	Special Weather Statement	GSP	Graham	51 min
Aug 11, 11:07 PM EDT	Special Weather Statement	GSP	Jackson, Macon	38 min
Aug 11, 11:21 PM EDT	Severe Thunderstorm Warning	GSP	Graham, Macon, Swain	24 min
Aug 11, 11:47 PM EDT	Special Weather Statement	GSP	Graham	13 min
Aug 11, 11:47 PM EDT	Special Weather Statement	GSP	Jackson, Macon	43 min
Aug 11, 8:11 PM EDT	Severe Thunderstorm Warning	GSP	Laurens, Spartanburg, Union	49 min
Aug 11, 8:20 PM EDT	Special Weather Statement	GSP	Union	25 min
Aug 11, 8:36 PM EDT	Severe Thunderstorm Warning Considerable damage threat	GSP	Chester, Laurens, Union	54 min
Aug 11, 11:42 PM EDT	Special Weather Statement	GSP	Spartanburg	33 min
Aug 12, 5:32 PM EDT	Special Weather Statement	GSP	Laurens	28 min
Aug 12, 6:21 PM EDT	Severe Thunderstorm Warning	GSP	Greenville	39 min
Aug 12, 7:03 PM EDT	Special Weather Statement	GSP	Greenville	42 min
Aug 12, 7:37 PM EDT	Special Weather Statement	GSP	Laurens	38 min
Aug 12, 7:49 PM EDT	Special Weather Statement	GSP	Greenville	41 min
Aug 12, 12:54 AM EDT	Special Weather Statement	GSP	Rabun	36 min
Aug 12, 1:22 AM EDT	Special Weather Statement	GSP	Habersham	38 min
Aug 12, 2:04 AM EDT	Special Weather Statement	GSP	Habersham	26 min
Aug 12, 2:30 AM EDT	Special Weather Statement	GSP	Franklin	45 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2026 Every 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.