Alert archive / South Carolina / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 23, NWS Greenville-Spartanburg, SC

April 11, 2007Laurens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 11, 2007, 11:52 PM EDT for Laurens County, South Carolina. It was in force for 23 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: Apr 11, 2007, 11:52 PM EDT (03:52 UTC)
Expired: Apr 12, 2007, 12:15 AM EDT
In force: 23 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Counties, with a storm outline in the text

County Laurens County, SC

The radar

The Greer radar (KGSP), 49 km from the middle of the area, began a volume at 03:53 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 11, 11:01 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 3.9 hours before the alert went out and 256 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: 289 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 740 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

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 Apr 11, 10:02 PM EDT, 1 hour 50 minutes earlier.

Area forecast discussion, Apr 11, 10:02 PM EDT, 1 hour 50 minutes before

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Hazardous weather outlook, Apr 11, 11:17 PM EDT, 35 minutes before

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In the hours before

Special weather statement, Apr 11, 7:09 PM EDT, 4 hours 43 minutes before

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Special weather statement, Apr 11, 11:19 PM EDT, 33 minutes before

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Special weather statement, Apr 11, 11:46 PM EDT, 6 minutes before

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Special weather statement, Apr 11, 11:50 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
Apr 12, 12:16 AM EDT	Severe Thunderstorm Warning	GSP	Davie	29 min
Apr 12, 12:47 AM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg	28 min
Apr 12, 1:08 AM EDT	Severe Thunderstorm Warning	GSP	Mecklenburg, Union	37 min
Apr 12, 4:24 AM EDT	Dense Fog Advisory	GSP	Alexander, Burke, Caldwell, Catawba, Cleveland, Iredell and 4 more	6 hr
Apr 12, 4:24 AM EDT	Lake Wind Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	16 hr
Apr 12, 12:42 AM EDT	Severe Thunderstorm Warning	GSP	Chester, York	33 min
Apr 12, 11:27 AM EDT	Fire Weather Watch	GSP	Abbeville, Anderson, Cherokee, Chester, Greenwood, Laurens and 2 more	9 hr
Apr 12, 3:48 PM EDT	Red Flag Warning	GSP	Elbert, Franklin, Habersham, Hart, Rabun, Stephens	12 hr

Nearby

Severe Thunderstorm Warnings in South Carolina, 2007 Every severe thunderstorm warning in 2007

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.