Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 11, NWS Columbia, SC

March 31, 2002Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Mar 31, 2002, 2:34 PM EST for Sumter County, South Carolina. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 31, 2002, 2:34 PM EST (19:34 UTC)
Expired
Mar 31, 2002, 3:15 PM EST
In force
41 min
Issued by
NWS Columbia, SC
Area
Counties, with a storm outline in the text

County Sumter County, SC

The watch it was issued in

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

IssuedProductOfficeLasted
Mar 31, 1:00 PM ESTSevere Thunderstorm WatchSPC6 hr
Mar 31, 1:15 PM ESTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 7.6 hours before the alert went out and 137 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 2002-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 775 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 2002-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 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
775 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

439 
WUUS52 KCAE 311934
SVRCAE
SCC085-312015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
232 PM EST SUN MAR 31 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
    SUMTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 315 PM EST.

* AT 232 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES WEST OF OAKLAND..MOVING NORTHEAST AT 20
  MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
WESTERN SUMTER COUNTY.

LAT...LON 3401 8074 3389 8059 3408 8038 3415 8050

RCC

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 31, 1:12 PM ESTSevere Thunderstorm WarningCAEEdgefield48 min
Mar 31, 1:37 PM ESTSevere Thunderstorm WarningCAEAiken38 min
Mar 31, 2:03 PM ESTSevere Thunderstorm WarningCAELexington42 min
Mar 31, 2:29 PM ESTSevere Thunderstorm WarningCAECalhoun31 min
Mar 31, 2:38 PM ESTSevere Thunderstorm WarningCAEFairfield22 min
Mar 31, 2:48 PM ESTSevere Thunderstorm WarningCAELee57 min
Mar 31, 3:09 PM ESTSevere Thunderstorm WarningCAEClarendon, Sumter36 min
Mar 31, 5:58 PM ESTSevere Thunderstorm WarningCAELee, Sumter47 min
Mar 31, 6:06 PM ESTSevere Thunderstorm WarningCAEOrangeburg54 min
Mar 31, 6:56 PM ESTSevere Thunderstorm WarningCAECalhoun34 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2002Every severe thunderstorm warning in 2002

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.