Alert archive / South Carolina / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 7, NWS Charleston, SC

May 5, 1989Colleton County, Dorchester County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at May 5, 1989, 8:50 PM EDT for Colleton County, Dorchester County, South Carolina. It was in force for 40 min. 3 reports 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
May 5, 1989, 8:50 PM EDT (00:50 UTC)
Expired
May 5, 1989, 9:30 PM EDT
In force
40 min
Issued by
NWS Charleston, SC
Area
Whole counties

Counties Colleton County, SC, Dorchester County, SC

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
May 5, 9:15 PM EDTThunderstorm Wind 0Dorchester, SC
May 5, 9:25 PM EDTThunderstorm Wind 0Colleton, SC
May 5, 9:25 PM EDTThunderstorm Wind 0Dorchester, SC

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 0.8 hours before the alert went out and 50 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 1989-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 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 1989-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 159 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
42 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
1282 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
159 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 8:38 PM EDTSevere Thunderstorm WarningCHSHampton52 min
May 5, 9:10 PM EDTSevere Thunderstorm WarningCHSBerkeley65 min
May 5, 9:29 PM EDTSevere Thunderstorm WarningCHSWilliamsburg61 min
May 5, 9:32 PM EDTSevere Thunderstorm WarningCHSColleton, Dorchester58 min
May 5, 10:05 PM EDTSevere Thunderstorm WarningCHSCharleston, Georgetown55 min
May 5, 10:05 PM EDTSevere Thunderstorm WarningCHSHorry55 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1989Every severe thunderstorm warning in 1989

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.