Alert archive / South Carolina / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 153, NWS Columbia, SC

July 27, 2007Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jul 27, 2007, 4:44 PM EDT for Sumter 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
Jul 27, 2007, 4:44 PM EDT (20:44 UTC)
Expired
Jul 27, 2007, 5:30 PM EDT
In force
46 min
Issued by
NWS Columbia, SC
Area
Counties, with a storm outline in the text

County Sumter County, SC

The radar

The Columbia radar (KCAE), 68 km from the middle of the area, began a volume at 20:44 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, 8.7 hours before the alert went out and 118 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 2007-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2040 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 2007-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939Sfc1 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
2040 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
921 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 3:58 PM EDTSevere Thunderstorm WarningCAECalhoun47 min
Jul 27, 4:34 PM EDTSevere Thunderstorm WarningCAELee41 min
Jul 27, 4:44 PM EDTSevere Thunderstorm WarningCAECalhoun46 min
Jul 27, 4:47 PM EDTSevere Thunderstorm WarningCAEKershaw43 min
Jul 27, 5:27 PM EDTSevere Thunderstorm WarningCAECalhoun33 min
Jul 27, 5:28 PM EDTSevere Thunderstorm WarningCAELee, Sumter47 min
Jul 27, 6:00 PM EDTSevere Thunderstorm WarningCAEOrangeburg45 min
Jul 27, 6:30 PM EDTSevere Thunderstorm WarningCAESumter45 min
Jul 27, 6:47 PM EDTSevere Thunderstorm WarningCAEOrangeburg43 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2007Every severe thunderstorm warning in 2007

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.