Alert archive / South Carolina / Heat Advisories in 2012

Heat Advisory 8, NWS Wilmington, NC

July 23, 20128 counties in South Carolina; 6 counties in North Carolina

NWS Wilmington, NC issued this heat advisory at Jul 23, 2012, 3:19 PM EDT for 8 counties in South Carolina; 6 counties in North Carolina. It took effect at Jul 24, 2012, 11:00 AM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jul 23, 2012, 3:19 PM EDT (19:19 UTC)
In effect from: Jul 24, 2012, 11:00 AM EDT
Expired: Jul 24, 2012, 7:00 PM EDT
In force: 8 hr
Issued by: NWS Wilmington, NC

Counties Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Robeson 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 radar

The Wilmington radar (KLTX), 59 km from the middle of the area, began a volume at 19:20 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

Newport, NC (KMHX), launched 12:00Z, 7.3 hours before the alert went out and 208 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: 2216 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 922 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 33 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 23, 1:25 PM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Jul 23, 1:25 PM EDT, 1 hour 54 minutes before

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Hazardous weather outlook, Jul 23, 1:58 PM EDT, 1 hour 21 minutes before

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In the hours before

Special weather statement, Jul 23, 2:46 PM EDT, 33 minutes before

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Special weather statement, Jul 23, 2:54 PM EDT, 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
254 PM EDT MON JUL 23 2012

SCZ017-023-232000-
DARLINGTON-MARLBORO-
254 PM EDT MON JUL 23 2012

...STRONG THUNDERSTORMS WILL MOVE ACROSS MARLBORO AND DARLINGTON
COUNTIES THROUGH 400 PM EDT...

AT 254 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER
DOVESVILLE...OR ABOUT 7 MILES NORTH OF DARLINGTON...MOVING EAST AT 20
MPH.

SOME LOCATIONS IMPACTED INCLUDE BENNETTSVILLE...DARLINGTON...
HARTSVILLE...AUBURN...BROWNSVILLE...CHAVISTOWN...CLIO...CLYDE...
DARLINGTON RACEWAY...DOVESVILLE...DUNBAR AND FLOYD.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.

FREQUENT CLOUD TO GROUND LIGHTNING.

THUNDERSTORMS CAN POSE A VARIETY OF THREATS INCLUDING GUSTY WINDS...
SMALL HAIL...CLOUD TO GROUND LIGHTNING...AND LOCALIZED FLOODING. IT
IS RECOMMENDED THAT YOU REMAIN INDOORS UNTIL THE STORMS PASS.

&&

LAT...LON 3450 8005 3449 7988 3454 7983 3460 7981
      3461 7978 3468 7987 3470 7986 3463 7946
      3431 7963 3429 7968 3429 7973 3425 7975
      3426 7980 3411 8003 3417 8015 3420 8012
      3423 8012 3436 8018 3432 8024 3436 8029
TIME...MOT...LOC 1854Z 279DEG 18KT 3440 7986

WEISS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 2:46 PM EDT	Special Weather Statement	ILM	Dillon	59 min
Jul 23, 2:54 PM EDT	Special Weather Statement	ILM	Darlington, Marlboro	66 min
Jul 23, 3:44 PM EDT	Special Weather Statement	ILM	Florence, Marion	61 min
Jul 23, 4:07 PM EDT	Special Weather Statement	ILM	Dillon	53 min
Jul 23, 4:42 PM EDT	Special Weather Statement	ILM	Florence, Marion	63 min
Jul 23, 5:42 PM EDT	Special Weather Statement	ILM	Horry	63 min
Jul 23, 7:31 PM EDT	Special Weather Statement	ILM	Marlboro	59 min
Jul 23, 5:04 PM EDT	Special Weather Statement	ILM	Columbus, New Hanover, Pender	56 min
Jul 23, 5:29 PM EDT	Severe Thunderstorm Warning	ILM	Bladen, Brunswick, Columbus, Pender	29 min
Jul 23, 6:11 PM EDT	Special Weather Statement	ILM	Bladen, Columbus, New Hanover, Pender	64 min

Nearby

Heat Advisories in South Carolina, 2012 Heat Advisories in North Carolina, 2012 Every heat advisory in 2012

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.