Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 6, NWS Charleston, SC

March 31, 2002Jasper County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Mar 31, 2002, 1:59 PM EST for Jasper County, South Carolina. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 31, 2002, 1:59 PM EST (18:59 UTC)
Expired: Mar 31, 2002, 3:00 PM EST
In force: 61 min
Issued by: NWS Charleston, SC
Area: Whole counties

County Jasper County, SC

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 31, 1:15 PM EST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 7.0 hours before the alert went out and 110 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: 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.

921 
WUUS52 KCHS 311859 CCA
SVRCHS
SCC053-312000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED...CORRECTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
153 PM EST SUN MAR 31 2002
CORRECTED TO REMOVE EFFINGHAM COUNTY IN GEORGIA

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTHERN JASPER COUNTY IN SOUTHERN SOUTH CAROLINA.

* UNTIL 300 PM EST.

* AT 153 PM EST...RADAR INDICATED A SEVERE THUNDERSTORM NEAR
  RINCON...OR ABOUT 7 MILES SOUTHEAST OF SPRINGFIELD...MOVING
  NORTHEAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...  
  TILLMAN.
  TARBORO.
  SWITZERLAND.
  RIDGELAND.
  GRAHAMVILLE.

GOLFBALL SIZED HAIL AND 60 MPH WINDS ARE POSSIBLE IN THE WARNED AREA.

VERY LARGE HAIL IS LIKELY WITH THIS DANGEROUS SEVERE THUNDERSTORM...
IF YOU ARE IN THE PATH THIS STORM...PUT YOUR CAR IN A GARAGE AND MOVE
INDOORS TO AN INTERIOR ROOM ON THE LOWEST FLOOR AWAY FROM WINDOWS.

$$

LAT...LON 3233 8142 3220 8127 3250 8089 3266 8108

NNNN
WOODWORTH

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 31, 1:11 PM EST, 48 minutes earlier.

Area forecast discussion, Mar 31, 1:11 PM EST, 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
111 PM EST SUN MAR 31 2002

WL UPDATE ZONE AND COASTAL WATERS FORECAST FOR SVR TSTM WATCH 66.

.CHS...
GA...SEVERE THUNDERSTORM WATCH UNTIL 7 PM EST
     AMZ354-374-GAZ087-088-099>101-114>119-137>141.
SC...SEVERE THUNDERSTORM WATCH UNTIL 7 PM EST
     AMZ330-350-352-SCZ040-042>045-047>050.
     SMALL CRAFT ADVISORY AMZ330.

WOODWORTH

In the hours before

Special weather statement, Mar 31, 12:40 PM EST, 1 hour 19 minutes before

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>050-010400-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
1240 PM EST SUN MAR 31 2002

...SCATTERED SEVERE THUNDERSTORMS POSSIBLE ACROSS SOUTHEAST GEORGIA
AND SOUTHERN SOUTH CAROLINA THIS AFTERNOON INTO THIS EVENING...

TEMPERATURES AROUND 80 DEGREES COMBINED WITH DEWPOINTS IN THE 60S
WILL PRODUCE A WARM AND UNSTABLE AIRMASS FOR THE REGION. RESIDUAL
SURFACE BOUNDARIES FROM CONVECTIVE ACTIVITY LAST NIGHT...ALONG WITH
A DEVELOPING PRE FRONTAL TROUGH...WILL ACT TO FOCUS THUNDERSTORM
ACTIVITY THIS AFTERNOON AND INTO THIS EVENING. STRONG UPPER LEVEL
DYNAMICS WILL AID IN THE DEVELOPMENT OF THESE THUNDERSTORMS INTO THE
EVENING HOURS. SOME OF THE THUNDERSTORMS THAT DEVELOP MAY BECOME
SEVERE. THE MAIN THREATS WILL BE DAMAGING HAIL AND WIND GUSTS IN
EXCESS OF 60 MPH.

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING.
SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD MONITOR THE
WEATHER AND REMAIN ALERT AND BE PREPARED TO TAKE ACTION IN THE EVENT
OF A WATCH OR WARNINGS.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.

WOODWORTH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 1:54 PM EST	Severe Thunderstorm Warning	CHS	Jasper	66 min
Mar 31, 2:49 PM EST	Severe Thunderstorm Warning	CHS	Colleton, Hampton	41 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; the sounding from the Mesonet's radiosonde archive.