Alert archive / South Carolina / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 90, NWS Greenville-Spartanburg, SC

May 7, 2009Abbeville County, South Carolina; Elbert County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 7, 2009, 5:00 PM EDT for Abbeville County, South Carolina; Elbert County, Georgia. It was in force for 41 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: May 7, 2009, 5:00 PM EDT (21:00 UTC)
Expired: May 7, 2009, 5:41 PM EDT
In force: 41 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Elbert County, GA, Abbeville County, SC

The radar

The Greer radar (KGSP), 89 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 193 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: 468 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 739 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.4

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 May 7, 2:25 PM EDT, 2 hours 35 minutes earlier.

Area forecast discussion, May 7, 2:25 PM EDT, 2 hours 35 minutes before

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Hazardous weather outlook, May 7, 4:06 AM EDT, 12 hours 54 minutes before

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In the hours before

Special weather statement, May 7, 3:41 PM EDT, 1 hour 19 minutes before

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Special weather statement, May 7, 3:56 PM EDT, 1 hour 4 minutes before

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Special weather statement, May 7, 4:24 PM EDT, 36 minutes before

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Special weather statement, May 7, 4:29 PM EDT, 31 minutes before

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Local storm report, May 7, 4:31 PM EDT, 29 minutes before

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Special weather statement, May 7, 4:58 PM EDT, 2 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
May 7, 5:09 PM EDT	Severe Thunderstorm Warning	GSP	Catawba, Lincoln	60 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2009 Severe Thunderstorm Warnings in Georgia, 2009 Every severe thunderstorm warning in 2009

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.