Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 70, NWS Tallahassee, FL
NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 19, 1990, 6:42 PM CDT for Jackson County, Florida. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Aug 19, 1990, 6:42 PM CDT (23:42 UTC)
- Expired
- Aug 19, 1990, 7:15 PM CDT
- In force
- 33 min
- Issued by
- NWS Tallahassee, FL
- Area
- Whole counties
County Jackson County, FL
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, 11.7 hours before the alert went out and 120 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
- 645 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1136 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 41 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 192342 SVRTLH FLC063-200015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TALLAHASSEE FL 742 PM EDT (642 PM CDT) SUN AUG 19 1990 THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 815 PM EDT (715 PM CDT) FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH FLORIDA ...SOUTHWESTERN JACKSON COUNTY AT 640 PM CDT NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUTHWEST JACKSON COUNTY NEAR ALFORD. THIS STORM WILL LIKELY PRODUCE HAIL AND DAMAGING WINDS AS IT MOVES TOWARD THE SOUTHWEST AT 10 MILES AN HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...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 19, 3:11 PM CDT, 3 hours 31 minutes before
GAZ011-192115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TALLAHASSEE FL 408 PM EDT SUN AUG 19 1990 AT 405 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG THUNDERSTORM OVER NORTHWEST THOMAS COUNTY OF SOUTHWEST GEORGIA. THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY HEAVY RAINFALL...FREQUENT CLOUD TO GROUND LIGHTNING...STRONG GUSTY WIND...AND POSSIBLE SMALL HAIL. THIS THUNDERSTORM IS MOVING TOWARD THE SOUTHWEST AT 10 MILES AN` HOUR AND IT MAY MOVE INTO EAST CENTRAL GRADY COUNTY OF SOUTHWEST GEORGIA DURING THE NEXT 30 MINUTES. STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS MEDIA FOR ADDITIONAL INFORMATION. JGM
Nearby
Severe Thunderstorm Warnings in Florida, 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.