Alert archive / South Carolina / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 186, NWS Columbia, SC

August 22, 2007Lee County, Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 22, 2007, 11:42 PM EDT for Lee County, Sumter County, South Carolina. It was in force for 48 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, 2007, 11:42 PM EDT (03:42 UTC)
Expired: Aug 23, 2007, 12:30 AM EDT
In force: 48 min
Issued by: NWS Columbia, SC
Area: Counties, with a storm outline in the text

Counties Lee County, SC, Sumter County, SC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 3.7 hours before the alert went out and 230 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: 497 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1769 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 136 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 Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 22, 9:59 PM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Aug 22, 9:59 PM EDT, 1 hour 43 minutes before

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Hazardous weather outlook, Aug 22, 11:35 PM EDT, 7 minutes before

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In the hours before

Local storm report, Aug 22, 5:42 PM EDT, 6 hours before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 10:27 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw	48 min
Aug 22, 11:00 PM EDT	Severe Thunderstorm Warning	CAE	Lee	45 min
Aug 23, 12:29 AM EDT	Severe Thunderstorm Warning	CAE	Clarendon	46 min
Aug 23, 6:07 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield	23 min
Aug 23, 7:42 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield	48 min

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.