Alert archive / South Carolina / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 14, NWS Wilmington, NC

April 12, 2013Georgetown County, Williamsburg County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Apr 12, 2013, 3:29 PM EDT for Georgetown County, Williamsburg County, South Carolina. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 12, 2013, 3:29 PM EDT (19:29 UTC)
Expired
Apr 12, 2013, 4:15 PM EDT
In force
46 min
Issued by
NWS Wilmington, NC
Area
Storm-based polygon

Counties Georgetown County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 113 km from the middle of the area, began a volume at 19:31 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, 7.5 hours before the alert went out and 82 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-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2013-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 914 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2013-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
914 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
453 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.6

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 3:48 AM EDTSpecial Weather StatementILMDarlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more87 min
Apr 12, 3:49 AM EDTSpecial Weather StatementILMDarlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more86 min
Apr 12, 4:44 AM EDTSpecial Weather StatementILMDillon, Georgetown, Horry, Marion76 min
Apr 12, 5:49 AM EDTSpecial Weather StatementILMDillon, Marlboro56 min
Apr 12, 6:54 AM EDTAreal Flood AdvisoryILMHorry111 min
Apr 12, 9:35 AM EDTSpecial Marine WarningILM55 min
Apr 12, 9:57 AM EDTSpecial Marine WarningILM63 min
Apr 12, 11:04 AM EDTSpecial Marine WarningILM56 min
Apr 12, 12:50 PM EDTSpecial Marine WarningILM55 min
Apr 12, 1:39 PM EDTSpecial Weather StatementILMDarlington, Marlboro36 min
Apr 12, 1:44 PM EDTSpecial Marine WarningILM61 min
Apr 12, 2:24 PM EDTSpecial Weather StatementILMDillon, Florence36 min
Apr 12, 2:32 PM EDTSpecial Weather StatementILMWilliamsburg28 min
Apr 12, 2:45 PM EDTSevere Thunderstorm WarningILMFlorence, Williamsburg60 min
Apr 12, 3:05 PM EDTSpecial Weather StatementILMDillon25 min
Apr 12, 3:19 PM EDTSevere Thunderstorm WarningILMFlorence, Georgetown, Horry, Marion, Williamsburg56 min
Apr 12, 4:00 PM EDTSpecial Weather StatementILMHorry30 min
Apr 12, 3:34 PM EDTSpecial Weather StatementILMBladen26 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2013Every severe thunderstorm warning in 2013

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.