Alert archive / South Carolina / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 21, NWS Wilmington, NC

April 22, 1997Florence County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Apr 22, 1997, 10:52 PM EDT for Florence County, South Carolina. It was in force for 33 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: Apr 22, 1997, 10:52 PM EDT (02:52 UTC)
Expired: Apr 22, 1997, 11:25 PM EDT
In force: 33 min
Issued by: NWS Wilmington, NC
Area: Whole counties

County Florence 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
Apr 22, 9:00 PM EDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 2.9 hours before the alert went out and 128 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: 885 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1589 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KILM 230252 RRA
SVRILM
SCC041-230325-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON NC
1052 PM EDT TUE APR 22 1997

THE NATIONAL WEATHER SERVICE IN WILMINGTON NC HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1125 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHEAST SOUTH CAROLINA

   ...FLORENCE
 
AT 1051 PM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY WILMINGTON
DOPPLER RADAR 4 MILES WEST OF COWARD MOVING EAST AT 72 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
        COWARD                  BY 1055 PM EDT
        EFFINGHAM               BY 1057 PM EDT
        LAKE CITY               BY 1058 PM EDT
        EVERGREEN               BY 1059 PM EDT
        PAMPLICO                BY 1103 PM EDT
        HANNAH                  BY 1104 PM EDT
        KINGSBURG               BY 1110 PM EDT

A TORNADO WATCH IS ALSO IN EFFECT.  SEVERE THUNDERSTORMS CAN
PRODUCE TORNADOES.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS
PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

IRELAND

The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 22, 9:54 PM EDT	Severe Thunderstorm Warning	ILM	Florence	61 min
Apr 22, 10:22 PM EDT	Tornado Warning	ILM	Florence	33 min
Apr 22, 10:37 PM EDT	Severe Thunderstorm Warning	ILM	Williamsburg	63 min
Apr 22, 10:41 PM EDT	Severe Thunderstorm Warning	ILM	Horry, Marion	64 min
Apr 22, 10:58 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown	47 min
Apr 22, 11:13 PM EDT	Tornado Warning	ILM	Horry, Marion	32 min
Apr 23, 2:14 AM EDT	Severe Thunderstorm Warning	ILM	Florence	46 min
Apr 23, 2:40 AM EDT	Severe Thunderstorm Warning	ILM	Marion	35 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1997 Every severe thunderstorm warning in 1997

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.