Alert archive / South Carolina / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 117, NWS Columbia, SC

May 20, 2006Kershaw County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 20, 2006, 10:54 PM EDT for Kershaw County, South Carolina. It was in force for 36 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
May 20, 2006, 10:54 PM EDT (02:54 UTC)
Expired
May 20, 2006, 11:30 PM EDT
In force
36 min
Issued by
NWS Columbia, SC
Area
Counties, with a storm outline in the text

County Kershaw County, SC

The radar

The Columbia radar (KCAE), 65 km from the middle of the area, began a volume at 02:56 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 20, 3:34 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 2.9 hours before the alert went out and 169 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 00:00Z on 2006-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1652 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 00:00Z on 2006-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 square meters per square second.193958Sfc1 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
1652 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
1772 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
218 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.2

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 9:41 PM EDTSevere Thunderstorm WarningCAEChesterfield27 min
May 21, 3:13 PM EDTSevere Thunderstorm WarningCAENewberry47 min
May 21, 3:27 PM EDTSevere Thunderstorm WarningCAESaluda48 min
May 21, 3:47 PM EDTSevere Thunderstorm WarningCAELexington58 min
May 21, 4:09 PM EDTSevere Thunderstorm WarningCAERichland51 min
May 21, 4:29 PM EDTSevere Thunderstorm WarningCAECalhoun31 min
May 21, 4:40 PM EDTSevere Thunderstorm WarningCAESumter50 min
May 21, 5:10 PM EDTSevere Thunderstorm WarningCAEClarendon35 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2006Every severe thunderstorm warning in 2006

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.