Alert archive / Florida / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 49, NWS Tallahassee, FL

April 29, 1996Jackson County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 29, 1996, 6:21 PM CDT for Jackson County, Florida. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 29, 1996, 6:21 PM CDT (23:21 UTC)
Expired
Apr 29, 1996, 7:00 PM CDT
In force
39 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Jackson County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.4 hours before the alert went out and 98 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 12:00Z on 1996-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1702 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 12:00Z on 1996-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 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
1702 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
592 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
-47 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 KTLH 292324
SVRTLH
FLC063-300000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
721 PM EDT (621 PM CDT) MON APR 29 1996
 
THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM EDT (700 PM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST FLORIDA
 
   ...JACKSON COUNTY
 
NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
MOVING ACROSS JACKSON COUNTY OF FLORIDA. THIS STORM IS JUST TO THE WEST
OF MARIANNA AND IS MOVING NORTHEAST AT ABOUT 25 TO 30 MPH.
 
DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING
ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM.@ SEEK SHELTER IN A STRONG
BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES. A MOBILE HOME IS NOT A SAFE REFUGE FROM A
SEVERE THUNDERSTORM...MOVE TO A MORE SUBSTANTIAL BUILDING.

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.

NWS Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 29, 2:50 PM CDT, 3 hours 31 minutes earlier.

Area forecast discussion, Apr 29, 2:50 PM CDT, 3 hours 31 minutes before
ALZ065>069-FLZ007>019-026>029-034-GAZ121>131-142>148-155>161-300815-

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
330 PM EDT MON APR 29 1996

ETA/NGM IN GOOD AGREEMENT BRINGING STRONG COLD FRONT THRU FORECAST
AREA BY 12 UTC TUESDAY. HOWEVER...LOOKS LIKE ETA UNDERPLAYS LOW-LEVEL
MOISTURE/INSTABILITY ACROSS REGION. SURFACE DEWPOINTS CURRENTLY IN
UPPER 60S-LOW 70S RANGE ACROSS ENTIRE AREA...AND TLH CAPE WAS ABOVE
3500 J/KG (ETA IS FORECASTING CAPES AROUND 500 J/KG ACROSS AREA
TONIGHT). NGM LOOKS MORE REASONABLE WITH ITS HANDLING OF LOW-LEVEL
MOISTURE/INSTABILITY.

STORM RELATIVE HELICITY WILL RANGE FROM 150-200 ACROSS AREA
TONIGHT...BUT WITH SUCH HIGH CAPE MENTIONING SEVERE STORMS LOOKS GOOD
IN THE ZONES. ALSO AGREE WITH LATEST MIA TERMINAL FCSTS WHICH CALL FOR
WIND GUSTS TO 35 KNOTS...LOW CIGS...AND LOW VSBYS WITH STORMS. LOOKS
LIKE RAPID CLEARING BY 18 UTC. AS FOR TAFS...XPCT LINE OF STG/SVR TSRA
TO MOV EWD ACRS FCST AREA BETWEEN 03 UTC TO 08 UTC TUE MORNING...WITH
RA ENDING BY 14 UTC.

FOURNIER/MOORE

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 5:15 PM CDTSevere Thunderstorm WarningTAEWalton45 min

Nearby

Severe Thunderstorm Warnings in Florida, 1996Every severe thunderstorm warning in 1996

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.