Alert archive / South Carolina / Heat Advisories in 2011

Heat Advisory 19, NWS Columbia, SC

August 7, 201116 counties in South Carolina; 5 counties in Georgia

NWS Columbia, SC issued this heat advisory at Aug 7, 2011, 9:49 PM EDT for 16 counties in South Carolina; 5 counties in Georgia. It took effect at Aug 8, 2011, 1:00 PM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Aug 7, 2011, 9:49 PM EDT (01:49 UTC)
In effect from: Aug 8, 2011, 1:00 PM EDT
Expired: Aug 8, 2011, 7:00 PM EDT
In force: 6 hr
Issued by: NWS Columbia, SC

All 21 counties

Burke County, GA, Columbia County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 28 km from the middle of the area, began a volume at 01:48 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.8 hours before the alert went out and 286 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: 1440 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1303 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 15 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 heat advisory 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 heat advisory went out at Aug 7, 7:42 PM EDT, 2 hours 7 minutes earlier.

Area forecast discussion, Aug 7, 7:42 PM EDT, 2 hours 7 minutes before

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Hazardous weather outlook, Aug 7, 7:47 PM EDT, 2 hours 2 minutes before

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Nearby

Heat Advisories in South Carolina, 2011 Heat Advisories in Georgia, 2011 Every heat advisory in 2011

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.