Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 4, NWS Tallahassee, FL

January 8, 1997Holmes County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jan 8, 1997, 7:00 AM CST for Holmes County, Florida. It was in force for 30 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jan 8, 1997, 7:00 AM CST (13:00 UTC)
Expired: Jan 8, 1997, 7:30 AM CST
In force: 30 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

County Holmes County, FL

The radar

The Eglin Afb radar (KEVX), 35 km from the middle of the area, began a volume at 12:55 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.

What was reported inside it

Time	Report	Where	Remark
Jan 8, 7:15 AM CST	Hail 0.75	Westville, FL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 1.0 hours before the alert went out and 79 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 434 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTLH 081302 RRA
SVRTLH
FLC059-081330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
800 AM EST (700 AM CST) WED JAN 8 1997
 
THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  830 AM EST (730 AM CST)
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST FLORIDA
 
   ...HOLMES COUNTY
 
NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
MOVING INTO THE SOUTHWEST PORTION OF HOLMES COUNTY. THIS STORM WILL PASS
OVER THE TOWN OF WESTVILLE BEFORE 730 AM CST. THIS STORM WILL LIKELY
PRODUCE SOME LARGE HAIL AS IT MOVES NORTHEAST AT 25 MPH THROUGH SOUTHERN
HOLMES COUNTY.
 
SEVERE THUNDERSTORMS PRODUCE WINDS OF 58 MPH OR HIGHER... LARGE
HAIL... DANGEROUS LIGHTNING AND VERY HEAVY RAIN.  IF YOU ARE IN THE
PATH OF THIS STORM... GO TO A SAFE PLACE IMMEDIATELY.

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 Jan 8, 2:20 AM CST, 4 hours 40 minutes earlier.

Area forecast discussion, Jan 8, 2:20 AM CST, 4 hours 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
320 AM EST WED JAN 8 1997

MDLS CONT TO DVLP SFC LOW OVR WRN GLF MEX TDY. BY THIS EVE LOW WILL BE
OVR S LA. MDLS THEN PROG SFC LOW TO DEEPEN AND MOVE TO WRN TN BY EARLY
THU MRNG AND INTO SRN GTR LAKES REGION BY THU EVENING TRAILING A COLD
FRONT ACRS THE SE.  MID-UPR LVL LOW CNTR WILL SHIFT FROM DESERT SW TO
UPR MIDWEST BY END OF FCST PRD. COLD FRONT ASSOC WITH SFC LOW WILL BE
JUST TO THE WEST OF FSCT AREA EARLY THU AND WILL PUSH INTO ERN PTNS OF
FA BY THU EVE. MDLS INDICATE PLENTY OF MSTR TRNSP...FLUX CNVGNC AND
VVELS ACRS AL/FL PNHNDL THU MRNG AND INTO SE GA AND ERN BIG BEND BY
00Z FRI.

AS INDICATED IN SELS DY2 SVR WX OTLK...WARM SECTOR WILL HAVE MOVD INTO
FL/GA AND AL ERLY THU AND PROGD WIND PROFILES AND INSTABILITY SUPPORT
POSSIBILITY OF SVR WX ON THU.

POPS SHOULD BE IN THE LIKELY CATGRY TDY FOR SE AL AND FL PNHNDL WITH
GOOD CHANCES ELSEWHERE. FOR TNGT...CATEGORICAL ACRS SE AL/FL PNHNDL
AND GOOD CHANCES FOR REMAINDER OF CWA. THEN FOR THU...LIKELY TO
CATEGORICAL ALL AREAS. FWC TEMPS LOOK REASONABLE...ALTHOUGH I'M NOT SO
SURE IF TEMPS WILL REACH VALUES INDICATED FOR THU. WE WILL BE IN WARM
SECTOR BY THEN...zBUT WITH HIGH POPS ON THU THNK A CATGRY OR TWO LWR
WOULD BE BETTER.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 8, 6:12 AM CST	Severe Thunderstorm Warning	TAE	Walton	48 min
Jan 8, 7:26 AM CST	Severe Thunderstorm Warning	TAE	Jackson	19 min
Jan 8, 7:35 AM CST	Severe Thunderstorm Warning	TAE	Holmes	10 min
Jan 8, 8:05 AM CST	Severe Thunderstorm Warning	TAE	Calhoun	40 min
Jan 8, 8:30 AM CST	Severe Thunderstorm Warning	TAE	Gadsden, Liberty	45 min

Nearby

Severe Thunderstorm Warnings in Florida, 1997 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.