Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 92, NWS Charleston, SC

October 7, 2002Berkeley County, Dorchester County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Oct 7, 2002, 11:31 PM EDT for Berkeley County, Dorchester County, South Carolina. It was in force for 59 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: Oct 7, 2002, 11:31 PM EDT (03:31 UTC)
Expired: Oct 8, 2002, 12:30 AM EDT
In force: 59 min
Issued by: NWS Charleston, SC
Area: Whole counties

Counties Berkeley County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 97 km from the middle of the area, began a volume at 03:33 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.

What was reported inside it

Time	Report	Where	Remark
Oct 7, 11:35 PM EDT	Thunderstorm Wind 50 E	St George, SC	Several trees and large limbs were down.

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

Charleston AFB, SC (KCHS), launched 00:00Z, 3.5 hours before the alert went out and 31 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: 2210 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

168 
WUUS52 KCHS 080331
SVRCHS
SCC015-035-080430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
1130 PM EDT MON OCT 7 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BERKELEY COUNTY IN SOUTHEAST SOUTH CAROLINA...
  DORCHESTER COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 1230 AM EDT.

* AT 1131 PM EDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
  FROM 5 MILES SOUTHEAST OF BONNEAU TO 10 MILES SOUTHWEST OF
  REEVESVILLE...OR FROM 6 MILES NORTHEAST OF MONCKS CORNER TO 12
  MILES SOUTHWEST OF SAINT GEORGE...MOVING SOUTH AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  RIDGEVILLE.
  JEDBURG.
  HUGER.
  SUMMERVILLE.
  SANGAREE.
  GOOSE CREEK.
  DELEMAR CROSSROADS.
  WANDO.
  DANIEL ISLAND.

DIME SIZE HAIL AND 60 MPH WINDS ARE EXPECTED IN THE WARNED AREA.

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 10:44 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Dorchester	46 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2002 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.