Alert archive / Georgia / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 69, NWS Tallahassee, FL
NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 18, 1990, 7:00 PM EDT for Grady County, Thomas County, Georgia. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Aug 18, 1990, 7:00 PM EDT (23:00 UTC)
- Expired
- Aug 18, 1990, 7:45 PM EDT
- In force
- 45 min
- Issued by
- NWS Tallahassee, FL
- Area
- Whole counties
Counties Grady County, GA, Thomas County, GA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Apalachicola Mun, FL (KAQQ), launched 12:00Z, 11.0 hours before the alert went out and 155 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.
- Mixed-layer CAPE
- 2311 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KTLH 182300
SVRTLH
GAC275-131-182345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
700 PM EDT SAT AUG 18 1990
THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
IN SOUTH CENTRAL GEORGIA
...NORTHWESTERN THOMAS COUNTY
IN SOUTHWEST GEORGIA
...EAST CENTRAL GRADY COUNTY
AT 7 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM OVER NORTHWEST THOMAS COUNTY MOVING TOWARD THE SOUTHWEST
AT 10 MILES AN HOUR.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY L{IGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.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, Aug 18, 4:29 PM EDT, 2 hours 31 minutes before
FLZ005-182130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TALLAHASSEE FL 426 PM EDT SAT AUG 18 1990 AT 425 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG THUNDERSTORM 10 MILES NORTHEAST OF TALLAHASSEE OVER NORTHERN LEON COUNTY. THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY HEAVY RAINFALL...FREQUENT CLOUD TO GROUND LIGHTNING...STRONG GUSTY WINDS...AND POSSIBLE SMALL HAIL. MOVEMENT WAS TOWARD THE SOUTH SOUTHWEST AT 10 MILES AN HOUR AND THIS THUNDERSTORM SHOULD MOVE ACROSS THE EASTERN HALF OF LEON COUNTY OF NORTH FLORIDA DURING THE NEXT HOUR. JGM
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; the sounding from the Mesonet's radiosonde archive.