Alert archive / South Carolina / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 294, NWS Greenville-Spartanburg, SC

July 21, 2008Oconee County, Pickens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 21, 2008, 3:24 PM EDT for Oconee County, Pickens County, South Carolina. It was in force for 38 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
Jul 21, 2008, 3:24 PM EDT (19:24 UTC)
Expired
Jul 21, 2008, 4:02 PM EDT
In force
38 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon

Counties Oconee County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 62 km from the middle of the area, began a volume at 19:23 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.4 hours before the alert went out and 219 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, Peachtre/Fal Fld, GA at 12:00Z on 2008-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1330 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, Peachtre/Fal Fld, GA at 12:00Z on 2008-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
1330 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1378 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
28 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 Jul 21, 2:21 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Jul 21, 2:21 PM EDT, 1 hour 3 minutes before
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Hazardous weather outlook, Jul 21, 2:49 PM EDT, 35 minutes before
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In the hours before

Special weather statement, Jul 21, 3:19 PM EDT, 5 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 2:38 PM EDTHeat AdvisoryGSPGaston, Mecklenburg, Union24 hr
Jul 21, 4:57 PM EDTSevere Thunderstorm WarningGSPMadison63 min
Jul 21, 5:07 PM EDTSevere Thunderstorm WarningGSPAvery, Mitchell, Yancey37 min
Jul 21, 5:50 PM EDTSevere Thunderstorm WarningGSPPolk, Rutherford55 min
Jul 21, 6:29 PM EDTSevere Thunderstorm WarningGSPCabarrus, Rowan61 min
Jul 21, 6:34 PM EDTSevere Thunderstorm WarningGSPGraham, Swain46 min
Jul 21, 6:40 PM EDTSevere Thunderstorm WarningGSPTransylvania65 min
Jul 21, 7:19 PM EDTSevere Thunderstorm WarningGSPCabarrus, Mecklenburg40 min
Jul 21, 7:25 PM EDTSevere Thunderstorm WarningGSPCleveland, Rutherford53 min
Jul 21, 4:37 PM EDTSevere Thunderstorm WarningGSPOconee53 min
Jul 21, 5:02 PM EDTSevere Thunderstorm WarningGSPGreenwood35 min
Jul 21, 5:30 PM EDTSevere Thunderstorm WarningGSPOconee40 min
Jul 21, 5:56 PM EDTSevere Thunderstorm WarningGSPCherokee, York64 min
Jul 21, 6:11 PM EDTSevere Thunderstorm WarningGSPAnderson51 min
Jul 21, 6:43 PM EDTSevere Thunderstorm WarningGSPOconee62 min
Jul 21, 6:56 PM EDTSevere Thunderstorm WarningGSPGreenville, Spartanburg64 min
Jul 21, 6:59 PM EDTSevere Thunderstorm WarningGSPAbbeville, Greenwood24 min
Jul 21, 7:10 PM EDTSevere Thunderstorm WarningGSPAnderson65 min
Jul 21, 7:27 PM EDTSevere Thunderstorm WarningGSPGreenville, Pickens53 min
Jul 21, 7:32 PM EDTSevere Thunderstorm WarningGSPGreenville, Laurens58 min
Jul 21, 7:42 PM EDTSevere Thunderstorm WarningGSPCherokee, York45 min
Jul 21, 7:56 PM EDTSevere Thunderstorm WarningGSPGreenville, Spartanburg29 min
Jul 21, 7:17 PM EDTSevere Thunderstorm WarningGSPElbert44 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2008Every severe thunderstorm warning in 2008

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.