Alert archive / South Carolina / Tornado Warnings in 1990

Tornado Warning 1, NWS Charleston, SC

August 29, 1990Berkeley County, South Carolina

NWS Charleston, SC issued this tornado warning at Aug 29, 1990, 10:34 PM EDT for Berkeley County, South Carolina. It was in force for 56 min. 2 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: Aug 29, 1990, 10:34 PM EDT (02:34 UTC)
Expired: Aug 29, 1990, 11:30 PM EDT
In force: 56 min
Issued by: NWS Charleston, SC
Area: Whole counties

County Berkeley 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

Time	Report	Where	Remark
Aug 29, 10:36 PM EDT	Thunderstorm Wind 0	Berkeley, SC
Aug 29, 11:15 PM EDT	Tornado F0	Berkeley, 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, 2.6 hours before the alert went out and 33 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4174 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 996 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCHS 300240
TORCHS
SCC015-300330-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
1034 PM EDT WED AUG 29 1990
 
THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1130 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN  SOUTH CAROLINA
 
   ...BERKELEY COUNTY
 
THIS INCLUDES THE COMMUNITIES OF
 
 
MONCKS CORNER
 
AT 1036PM EDT RADAR INDICATED A POSSIBLE TORNADO 5 MILES NORTHWEST OF
MONCKS CORNER MOVING SOUTHEAST AT 15 MILES AN HOUR.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM:
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 9:16 PM EDT	Severe Thunderstorm Warning	CHS	Jasper	59 min
Aug 29, 9:18 PM EDT	Severe Thunderstorm Warning	CHS	Williamsburg	57 min
Aug 29, 10:03 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	57 min

Nearby

Tornado Warnings in South Carolina, 1990 Every tornado warning in 1990 Tornadoes in 1990

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.