Alert archive / South Carolina / Heat Advisories in 2007

Heat Advisory 7, NWS Charleston, SC

August 14, 2007Effingham County, Long County, Georgia; 4 counties in South Carolina

NWS Charleston, SC issued this heat advisory at Aug 14, 2007, 3:44 AM EDT for Effingham County, Long County, Georgia; 4 counties in South Carolina. It took effect at Aug 14, 2007, 12:00 PM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Aug 14, 2007, 3:44 AM EDT (07:44 UTC)
In effect from: Aug 14, 2007, 12:00 PM EDT
Expired: Aug 14, 2007, 8:02 PM EDT
In force: 8 hr
Issued by: NWS Charleston, SC

Counties Effingham County, GA, Long County, GA, Berkeley County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 16 km from the middle of the area, began a volume at 07:44 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

Charleston AFB, SC (KCHS), launched 00:00Z, 7.7 hours before the alert went out and 85 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: 3026 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1112 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.1

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 Charleston, SC wrote its last area forecast discussion before this heat advisory went out at Aug 14, 3:35 AM EDT, 9 minutes earlier.

Area forecast discussion, Aug 14, 3:35 AM EDT, 9 minutes before

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Hazardous weather outlook, Aug 14, 12:07 AM EDT, 3 hours 37 minutes before

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In the hours before

Local storm report, Aug 13, 10:37 PM EDT, 5 hours 7 minutes before

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Special weather statement, Aug 13, 10:55 PM EDT, 4 hours 49 minutes before

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Local storm report, Aug 13, 11:04 PM EDT, 4 hours 40 minutes before

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Local storm report, Aug 13, 11:20 PM EDT, 4 hours 24 minutes before

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Local storm report, Aug 13, 11:34 PM EDT, 4 hours 10 minutes before

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Local storm report, Aug 14, 1:13 AM EDT, 2 hours 31 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 9:17 PM EDT	Severe Thunderstorm Warning	CHS	Jenkins	28 min
Aug 13, 9:39 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch	66 min
Aug 13, 11:10 PM EDT	Special Marine Warning	CHS		2 hr
Aug 14, 5:04 PM EDT	Heat Advisory	CHS	Bulloch, Candler, Effingham, Evans, Jenkins, Long and 2 more	27 hr

Nearby

Heat Advisories in South Carolina, 2007 Heat Advisories in Georgia, 2007 Every heat advisory 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.