Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 48, NWS Tallahassee, FL

April 27, 1997Calhoun County, Liberty County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 27, 1997, 2:27 PM CDT for Calhoun County, Liberty County, Florida. It was in force for 48 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 27, 1997, 2:27 PM CDT (19:27 UTC)
Expired
Apr 27, 1997, 3:15 PM CDT
In force
48 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

Counties Calhoun County, FL, Liberty County, FL

The radar

The Tallahassee radar (KTLH), 69 km from the middle of the area, began a volume at 19:29 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.5 hours before the alert went out and 72 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 1997-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 113 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 1997-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 215 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
113 J/kg
Mixed-layer CIN
-231 J/kg
Mixed-layer LCL
831 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
215 m²/s²
0-3 km storm-relative helicity
365 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTLH 271927 RRA
SVRTLH
FLC077-013-272015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
327 PM EDT (227 PM CDT) SUN APR 27 1997
 
THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM EDT (315 PM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH FLORIDA
 
   ...LIBERTY COUNTY
 
IN NORTHWEST FLORIDA
 
   ...CALHOUN COUNTY
 
AT 327 JPM EDT (227 PM CDT) NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED A LINE OF SEVERE THUNDERSTORMS DEVELOPING OVER THE
NORTHEASTERN CORNER OF GULF COUNTY...MOVING NORTH NORTHEAST AT 50 MPH.
THIS LINE OF THUNDERSTORMS WILL LIKELY PRODUCE DAMAGING WIND GUSTS IN
EXCESS OF 60 MPH ACROSS LIBERTY COUNTY AND PRIMARILY THE EASTERN HALF OF
CALHOUN COUNTY THROUGH 4:00 PM EDT (3:00 PM CDT). THIS LINE OF STORMS
WILL REACH BLOUNTSTOWN AND BRISTOL AROUND 3:50 PM EDT (2:50 PM CDT)
 
 
A TORNADO WATCH IS ALSO IN` EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING.

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 27, 2:00 PM CDT, 27 minutes earlier.

Area forecast discussion, Apr 27, 2:00 PM CDT, 27 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
300 PM EDT SUN APR 27 1997

MDLS IN FAIRLY GOOD AGREEMENT AS TO LIFTING OUT CLOSED UPR LO
CURRENTLY OVR LWR RIO GRANDE VLY AS STG NRN STREAM S/WV COMES INTO
PHASE WITH IT. MDLS MOVE UPR LO ALG TX COAST TONITE TO LWR MS VLY BY
MON MORN...THEN ACRS NRN AL/NRN GA LATE MON. ETA MOVS THIS FEATURE THE
FASTEST AND OPENS IT UP A LITTLE EARLIER THAN NGM/AVN...WHOSE TIMING
IS PREFERRED. AT THE SFC...E/W ORIENTATED WMFNT ACRS SRN AL/SRN GA
WILL CONT TO LIFT NWD AS SFC LO MOVS TO E CNTRL MS OVERNITE. AS A
RESULT... ENTIRE FCST AREA WILL BE IN WARM SECTOR BY EARLY EVENING
WITH HIGHEST PW AIR ACRS SERN HALF OF FCST AREA.

LATER THIS EVENING...ETA STARTS LOOKING DOWNRIGHT SCARY ACRS ERN PART
OF BIG BEND AND INTO S GA. ETA DVLPS LLVL JET OF 60+ KTS COLLOCATED
WITH DECENT UVV FROM RRQ OF JET. IN ADDITION...THE BEST LLVL MOISTURE
FLUX CONVERGENCE WILL LIE ACRS THE NE GULF AND INTO N FL/S GA BY 06Z
ALG WITH DECENT INSTABILITY IN WARM SECTOR. MOST COMPELLING IS ETA
BULLSEYE OF 500+ SR HELICITY MOVG ACRS N FL LATE THIS EVE. IF THIS
VERIFIES... THE THREAT FOR TORNADOES WOULD SEEM GREAT ACROSS THIS AREA
LATE THIS EVE. HOWEVER...MDLS HAVE NOT HANDLED SITUATION VERY WELL
LAST FEW RUNS.

ALREADY TOUCHED BASE WITH MIA ABOUT PSBL SVR WORDING IN NW FL ZONES
TONITE AND FLOOD POTENTIAL. AGAIN...WOULD STRONGLY SUGGEST SVR
WORDING...BUT WOULD PLAY DOWN FLOOD POTENTIAL AS IT HAS BEEN A DRY
SPRING AND MOST PLACES WITH THE EXCEPTION OF DIXIE COUNTY SHOULD BE
ABLE TO HANDLE A FEW INCHES OF RAIN.

THAT IS ALL FOR NOW...SVR WX HAS MADE THIS LATE ALREADY. GOTTA GO.

MOORE

Nearby

Severe Thunderstorm Warnings in Florida, 1997Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.