Alert archive / South Carolina / Heat Advisories in 2011

Heat Advisory 12, NWS Wilmington, NC

July 31, 20118 counties in South Carolina; Columbus County, North Carolina

NWS Wilmington, NC issued this heat advisory at Jul 31, 2011, 2:15 AM EDT for 8 counties in South Carolina; Columbus County, North Carolina. It took effect at Jul 31, 2011, 10:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jul 31, 2011, 2:15 AM EDT (06:15 UTC)
In effect from: Jul 31, 2011, 10:00 AM EDT
Expired: Jul 31, 2011, 4:03 PM EDT
In force: 6 hr
Issued by: NWS Wilmington, NC

Counties Columbus County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Marlboro County, SC, Williamsburg County, SC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 6.3 hours before the alert went out and 228 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: 635 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1928 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: -12 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 Wilmington, NC wrote its last area forecast discussion before this heat advisory went out at Jul 30, 7:55 PM EDT, 6 hours 20 minutes earlier.

Area forecast discussion, Jul 30, 7:55 PM EDT, 6 hours 20 minutes before

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Hazardous weather outlook, Jul 30, 7:39 PM EDT, 6 hours 36 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 31, 1:35 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Horry, Marion	55 min
Jul 31, 2:01 PM EDT	Special Weather Statement	ILM	Florence	59 min
Jul 31, 2:19 PM EDT	Special Weather Statement	ILM	Georgetown	56 min
Jul 31, 2:21 PM EDT	Severe Thunderstorm Warning	ILM	Horry	42 min
Jul 31, 2:35 PM EDT	Special Weather Statement	ILM	Marion	55 min
Jul 31, 3:16 PM EDT	Areal Flood Advisory	ILM	Florence	119 min
Jul 31, 3:32 PM EDT	Special Weather Statement	ILM	Williamsburg	58 min
Jul 31, 3:58 PM EDT	Areal Flood Advisory	ILM	Georgetown, Williamsburg	2 hr
Jul 31, 3:37 PM EDT	Special Weather Statement	ILM	Columbus	53 min
Jul 31, 4:47 PM EDT	Special Weather Statement	ILM	Columbus, Pender	43 min
Jul 31, 4:50 PM EDT	Special Weather Statement	ILM	Columbus, Pender	40 min
Jul 31, 5:21 PM EDT	Special Weather Statement	ILM	Pender	39 min
Jul 31, 6:10 PM EDT	Areal Flood Advisory	ILM	Bladen, Pender	2 hr

Nearby

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