Alert archive / Georgia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 47, NWS Tallahassee, FL

May 21, 1990Sumter County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at May 21, 1990, 4:30 PM EDT for Sumter County, Georgia. It was in force for 60 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: May 21, 1990, 4:30 PM EDT (20:30 UTC)
Expired: May 21, 1990, 5:30 PM EDT
In force: 60 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

County Sumter County, GA

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
May 21, 5:00 PM EDT	Thunderstorm Wind 0	Sumter, GA
May 21, 5:15 PM EDT	Hail 1.75	Sumter, GA

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

Athens Municipal, GA (KAHN), launched 12:00Z, 8.5 hours before the alert went out and 228 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1302 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 37 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.

000 
TTAA00 KCSG 212031
SVRCSG
GAC261-212130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBUS GA
430 PM EDT MON MAY 21 1990
 
THE NATIONAL WEATHER SERVICE IN COLUMBUS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL GEORGIA
 
   ...SUMTER COUNTY
 
AT 428 PM EDT WEATHER RADARS IN COLUMBUS AND WAYCROSS GEORGIA
WERE INDICATING A SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF
AMERICUS GEORGIA MOVING ALMOST DUE EAST AT 18 MILES AN HOUR.
HAIL IS INDICATED IN THIS STORM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIsN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 21, 2:41 PM EDT	Severe Thunderstorm Warning	TAE	Lee, Worth	49 min
May 21, 3:48 PM EDT	Severe Thunderstorm Warning	TAE	Chattahoochee, Muscogee	57 min
May 21, 4:57 PM EDT	Tornado Warning	TAE	Sumter	33 min
May 21, 5:51 PM EDT	Severe Thunderstorm Warning	TAE	Macon	54 min
May 21, 6:47 PM EDT	Severe Thunderstorm Warning	TAE	Mitchell	58 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1990 Every severe thunderstorm warning 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.