Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 13, NWS Tallahassee, FL

April 12, 1992Okaloosa County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 12, 1992, 7:43 PM CDT for Okaloosa County, Florida. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Apr 12, 1992, 7:43 PM CDT (00:43 UTC)
Expired
Apr 12, 1992, 8:45 PM CDT
In force
62 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Okaloosa County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 0.7 hours before the alert went out and 221 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, Tallahassee Rgnl, FL at 00:00Z on 1992-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 681 joules per kilogram.LCLLFCEL10008507005003002001001 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, Tallahassee Rgnl, FL at 00:00Z on 1992-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.1939Sfc1 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
681 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
1251 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
6 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 KPNS 130046
SVRPNS
FLC091-130145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENSACOLA FL
743 PM CDT SUN APR 12 1992
 
THE NATIONAL WEATHER SERVICE IN PENSACOLA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  845 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST FLORIDA
 
   ...OKALOOSA COUNTY
 
 
 
 
AT 740 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM WITH HAIL IN
OKALOOSA COUNTY FLORIDA NEAR CRESTVIEW. THE THUNDERSTORM WAS MOVING
SOUTH AT 15 MILES AN HOUR. THE THUNDERSTORM WILL MOVE THROUGH SOUTH
THROUGH OKALOOSA COUNTY TOWARD VALPARAISO...NICEVILLE AND FT WALTON
BEACH DURING THE NEXT 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, Apr 12, 2:48 PM CDT, 4 hours 55 minutes before
FLC037-045-121900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE APALACHICOLA FLORIDA
325 PM EDT SAT APR 11 1992

...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR FRANKLIN COUNTY
UNTIL 400 PM...

AT 325 PM EDT...NATIONAL WEATHER SERVICE RADAR SHOWED A LARGE
THUNDERSTORM MOVING OVER SOUTH FRANKLIN COUNTY.

MOVEMENT WAS TO THE EAST AT 15 MILES AN HOUR.

THIS THUNDERSTORM CAN BE ASSOCIATED WITH VERY HEAVY RAIN...THE
POSSIBILITY OF LARGE HAIL...STRONG GUSTY WINDS AND DANGEROUS
LIGHTNING.  ALSO...THERE IS A POSSIBILITY OF SMALL STREAM AND URBAN
STREET FLOODING WITH THIS STORM.

PERSONS IN THE VICINITY OF THIS STORM SHOULD SEEK SHELTER
IMMEDIATEDLY.

BOATERS SHOULD SEEK HARBOR ALSO.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 7:52 PM CDTSevere Thunderstorm WarningTAESanta Rosa53 min

Nearby

Severe Thunderstorm Warnings in Florida, 1992Every severe thunderstorm warning in 1992

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.