Alert archive / Florida / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 48, NWS Tallahassee, FL
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.
- 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
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.