Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 37, NWS Tallahassee, FL

April 22, 1990Gulf County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 22, 1990, 3:02 PM CDT for Gulf County, Florida. It was in force for 28 min.

The area

The counties it named.

The facts

Issued
Apr 22, 1990, 3:02 PM CDT (20:02 UTC)
Expired
Apr 22, 1990, 3:30 PM CDT
In force
28 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Gulf 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, 8.0 hours before the alert went out and 32 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 12:00Z on 1990-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 12:00Z on 1990-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 square meters per square second.193958Sfc1 km3 km6 km9 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1438 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
-38 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 KAQQ 222002
SVRAQQ
FLC045-222030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE APALACHICOLA FLORIDA
402 PM EDT SUN APR 22 1990
 
THE NATIONAL WEATHER SERVICE IN APALACHICOLA FLORIDA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  430 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS
 
IN  FLORIDA
 
   ...GULF COUNTY
 
 
A SEVERE THUNDERSTORM WAS LOCATED JUST NORTHEAST OF WEWAHITCHKA MOVING
SOUTHEAST AT 15 MILES AN HOUR.
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

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, Apr 22, 2:36 PM CDT, 26 minutes before
FLZ004-222025-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE APALACHICOLA FL
330 PM EDT SUN APR 22 1990

AT 325 PM EDT...WIDELY SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN
STRONG WINDS AND LIGHTING HAVE DEVELOPED OVER THE FLORIDA PANHANDLE.
THE STRONGEST STORMS WERE 30 MILES NORTH OF APALACHICOLA AND 25 MILES
NORTHEAST OF PENSACOLA.

THUNDERSTORMS AND SHOWERS EXTENDED FROM CROSS CITY TO WEST OF PENSACOLA
AND OVER THE APALACHEE BAY.

MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR.
Special weather statement, Apr 22, 2:57 PM CDT, 5 minutes before
FLZ003-005-GAZ011-221938

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
350 PM EDT SUN APR 22 1990

AT 345 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED SEVERAL STRONG
THUNDERSTORMS LOCATED IN THE WESTERN FLORIDA PANHANDLE AND BIG BEND
AREA OF FLORIDA. THE STRONGEST STORMS WERE IN SOUTHERN LIBERTY
COUNTY...SOUTHERN WAKULLA COUNTY AND ALONG THE COAST OF CENTRAL
TAYLOR COUNTY.

THESE THUNDERSTORMS WERE MOVING VERY SLOWLY SOUTH SOUTHEAST AT 5 TO
10 MPH.

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.