Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 95, NWS Columbia, SC

August 14, 1999Kershaw County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 14, 1999, 3:53 PM EDT for Kershaw County, South Carolina. It was in force for 37 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 14, 1999, 3:53 PM EDT (19:53 UTC)
Expired
Aug 14, 1999, 4:30 PM EDT
In force
37 min
Issued by
NWS Columbia, SC
Area
Whole counties

County Kershaw County, SC

What was reported inside it

TimeReportWhereRemark
Aug 14, 4:30 PM EDTThunderstorm Wind 55Cassatt, SCSheriff reported trees down on Providence road in Cassatt.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.9 hours before the alert went out and 333 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, Roanoke, VA at 12:00Z on 1999-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 267 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, Roanoke, VA at 12:00Z on 1999-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
267 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
937 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 3:00 PM EDTSevere Thunderstorm WarningCAERichland30 min
Aug 14, 3:31 PM EDTSevere Thunderstorm WarningCAESumter29 min
Aug 14, 3:41 PM EDTSevere Thunderstorm WarningCAELee34 min
Aug 14, 4:15 PM EDTSevere Thunderstorm WarningCAEClarendon, Sumter45 min
Aug 14, 4:57 PM EDTSevere Thunderstorm WarningCAEOrangeburg33 min
Aug 14, 5:32 PM EDTSevere Thunderstorm WarningCAEOrangeburg28 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1999Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.