Alert archive / Georgia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 31, NWS Tallahassee, FL

March 17, 1990Calhoun County, Terrell County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Mar 17, 1990, 2:20 AM EST for Calhoun County, Terrell County, Georgia. It was in force for 25 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
Mar 17, 1990, 2:20 AM EST (07:20 UTC)
Expired
Mar 17, 1990, 2:45 AM EST
In force
25 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

Counties Calhoun County, GA, Terrell 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

TimeReportWhereRemark
Mar 17, 2:30 AM ESTThunderstorm Wind 0Calhoun, 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

Apalachicola Mun, FL (KAQQ), launched 00:00Z, 7.3 hours before the alert went out and 218 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-pSkew-T log-p diagram, Apalachicola Mun, FL at 00:00Z on 1990-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 557 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Apalachicola Mun, FL at 00:00Z on 1990-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 square meters per square second.1939587897117Sfc1 km3 km6 kmRMLM
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
557 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCSG 170722
SVRCSG
GAC037-273-170745-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBUS GA
220 AM EST SAT MAR 17 1990
 
THE NATIONAL WEATHER SERVICE IN COLUMBUS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST GEORGIA
 
   ...CALHOUN COUNTY...TERRELL COUNTY
 
AT 217 AM EST WEATHER RADARS AND SATELLITE INFORMATION INDICATED A
SEVERE THUNDERSTORM JUST EAST OF EDISON GEORGIA IN CALHOUN COUNTY.
MOVEMENT WAS NORTHEAST AT 35 MPH.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVmANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

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.

In the hours before

Special weather statement, Mar 17, 1:08 AM EST, 1 hour 12 minutes before
FLZ003-005-GAZ011-012-170900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1:10 AM EST (12:10 AM CST) SAT MAR 17 1990

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 AM EST FOR MUCH OF
   NORTHWEST AND NORTH FLORIDA AND SOUTHWEST GEORGIA...

AT 100 AM EST NATIONAL WEATHER SERVICE RADARS INDICATED A LARGE AREA OF
SHOWERS WITH EMBEDDED THUNDERSTORMS CONTAINING HEAVY RAIN EXTENDED WEST
OF A LINE FROM NEAR BLAKELY GEORGIA TO PANAMA CITY AND INTO THE GULF FOR
OVER 150 MILES.  THE HEAVIEST SHOWERS WERE OVER NORTHERN JACKSON COUNTY.
THE RAIN AREA IS MOVING EAST AT 10 MPH.

WHILE THE THREAT FOR SEVERE WEATHER HAS DECREASED PERSONS SHOULD REMAIN
ON THE OUTLOOK FOR POTENTIALLY TlHREATENING WEATHER THROUGHOUT THE NIGHT.

FURTHER STATEMENTS WILL BE ISSUED IF NEEDED.

COLLINS
Special weather statement, Mar 17, 1:45 AM EST, 35 minutes before
FLZ004-170745-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE APALACHICOLA FL
138 AM EST SAT FEB 1771990

...TORNADO WATCH WATCH CONTINUES IN EFFECT FOR A LARGE PART OF THE
FLORIDA PANHANDLE...INCLUDING GULF COUNTY UNTIL 400 AM EST.

AT 127 AM EST...AN 80 MILE WIDE AREA OF RAIN AND ISOLATED THUNDERSTORMS
WITH HEAVU RAIN WAS OVER SOUTHEAST ALABAMA...EXTREME SOUTHWEST GEORGIA...
AND THE WEST FLORIDA PANHANDLE. THE STRONGEST THUNDERSTORMS WERE 20
MILES SOUTHWEST OF PANAMA CITY FLORIDA AND JUST SOUTHEAST OF DOTHAN
ALABAMA.

THE LEADING EDGE OF THIS AREA REACHED FROM 20 MILES EAST OF COLUMBUS
GEORGIA TO PANAMA CITY AND THEN TRAILED SOUTHWEST OUT OVER THE GULF FOR
WELL OVEIR 125 MILES.

THE AREA WAS DRIFTING SLOWLY TO THE EAST AT 5 MILES AN HOUR.
Special weather statement, Mar 17, 2:11 AM EST, 9 minutes before
FLZ003-005-GAZ011-012-170900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
2:15 AM EST (1:15 AM CST) SAT MAR 17 1990

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 AM EST FOR MUCH OF
   NORTHWEST AND NORTH FLORIDA AND SOUTHWEST GEORGIA...

AT 210 AM EST NATIONAL WEATHER SERVICE RADARS INDICATED A LARGE AREA OF
SHOWERS WITH EMBEDDED THUNDERSTORMS CONTAINING HEAVY RAIN EXTENDED WEST
OF A LINE FROM NEAR ALBANY GEORGIA TO PANAMA CITY AND INTO THE GULF FOR
OVER 150 MILES.  THE HEAVIEST THUNDERSTORMS WERE IN THE PANAMA CITY AREA
AND SOUTHWEST OF ALBANY GEORGIA.  THE PRECIPITATION IS MOVING EAST AT 5
MPH. HEAVY RAIN AND SOME THUNDERSTORMS SHOULD BEGIN MOVING INTO SOUTHERN
CALHOUN COUNTY DURING THE NEXT HOUR OR TWO.

FURTHER STATEMENTS WILL BE ISSUED AS NEEDED.

COLLINS

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 16, 9:34 PM ESTSevere Thunderstorm WarningTAEMacon, Taylor41 min
Mar 16, 11:40 PM ESTFlash Flood WarningTAEMuscogee3 hr
Mar 17, 12:57 AM ESTSevere Thunderstorm WarningTAEStewart63 min
Mar 17, 2:53 AM ESTFlash Flood WarningTAEMuscogee4 hr
Mar 17, 11:00 AM ESTFlash Flood WarningTAEWebster3 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 1990Every 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.