Alert archive / Georgia / Heat Advisories in 2011

Heat Advisory 18, NWS Charleston, SC

August 3, 20118 counties in Georgia; 5 counties in South Carolina

NWS Charleston, SC issued this heat advisory at Aug 3, 2011, 3:37 PM EDT for 8 counties in Georgia; 5 counties in South Carolina. It took effect at Aug 4, 2011, 11:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Aug 3, 2011, 3:37 PM EDT (19:37 UTC)
In effect from: Aug 4, 2011, 11:00 AM EDT
Expired: Aug 4, 2011, 8:00 PM EDT
In force: 9 hr
Issued by: NWS Charleston, SC

Counties Bulloch County, GA, Candler County, GA, Effingham County, GA, Evans County, GA, Jenkins County, GA, Long County, GA, Screven County, GA, Tattnall County, GA, Allendale County, SC, Berkeley County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 33 km from the middle of the area, began a volume at 19:40 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 12:00Z, 7.6 hours before the alert went out and 134 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: 168 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 92 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 Charleston, SC wrote its last area forecast discussion before this heat advisory went out at Aug 3, 12:48 PM EDT, 2 hours 49 minutes earlier.

Area forecast discussion, Aug 3, 12:48 PM EDT, 2 hours 49 minutes before

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Hazardous weather outlook, Aug 3, 4:25 AM EDT, 11 hours 12 minutes before

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In the hours before

Local storm report, Aug 3, 3:29 PM EDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
329 PM EDT WED AUG 03 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     EXCESSIVE HEAT   12 NE CHARLESTON        32.90N  79.78W
08/03/2011  M116.0 F         CHARLESTON         SC   AWOS

            HEAT INDEX OF 116 OBSERVED AT EAST COOPER AIRPORT.

&&

EVENT NUMBER CHS1100721

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:34 AM EDT	Heat Advisory	CHS	Bulloch, Candler, Effingham, Evans, Jenkins, Long and 2 more	16 hr
Aug 3, 3:37 PM EDT	Excessive Heat Watch	CHS	Effingham, Long	12 hr
Aug 3, 5:11 PM EDT	Special Weather Statement	CHS	Liberty	49 min
Aug 3, 4:35 PM EDT	Special Weather Statement	CHS	Beaufort	25 min

Nearby

Heat Advisories in Georgia, 2011 Heat Advisories in South Carolina, 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.