Alert archive / South Carolina / Heat Advisories in 2011

Heat Advisory 2, NWS Wilmington, NC

June 21, 20116 counties in South Carolina

NWS Wilmington, NC issued this heat advisory at Jun 21, 2011, 3:16 AM EDT for 6 counties in South Carolina. It took effect at Jun 21, 2011, 12:00 PM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jun 21, 2011, 3:16 AM EDT (07:16 UTC)
In effect from: Jun 21, 2011, 12:00 PM EDT
Expired: Jun 21, 2011, 5:31 PM EDT
In force: 6 hr
Issued by: NWS Wilmington, NC

Counties Darlington County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Williamsburg County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 7.3 hours before the alert went out and 120 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: 1164 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 2524 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 40 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 Jun 21, 2:50 AM EDT, 26 minutes earlier.

Area forecast discussion, Jun 21, 2:50 AM EDT, 26 minutes before

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Hazardous weather outlook, Jun 20, 3:54 PM EDT, 11 hours 22 minutes before

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In the hours before

Special weather statement, Jun 20, 9:33 PM EDT, 5 hours 43 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 3:07 PM EDT	Special Weather Statement	ILM	Horry	68 min
Jun 21, 3:47 PM EDT	Special Weather Statement	ILM	Horry	43 min
Jun 20, 9:33 PM EDT	Special Weather Statement	ILM	Pender	87 min
Jun 21, 3:55 PM EDT	Special Weather Statement	ILM	Columbus	65 min
Jun 21, 4:34 PM EDT	Special Weather Statement	ILM	Pender	56 min

Nearby

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.