Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 1, NWS Tallahassee, FL

January 22, 1998Walton County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jan 22, 1998, 1:11 PM CST for Walton County, Florida. It was in force for 59 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: Jan 22, 1998, 1:11 PM CST (19:11 UTC)
Expired: Jan 22, 1998, 2:10 PM CST
In force: 59 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

County Walton County, FL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 22, 12:00 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 7.2 hours before the alert went out and 35 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: 31 J/kg
Mixed-layer CIN: -193 J/kg
Mixed-layer LCL: 500 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 449 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

194 
WUUS1 KTLH 221910 RRA
SVRTLH
FLC131-222010-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
211 PM EST THU JAN 22 1998

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 210 PM CST (310 PM EST)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN FLORIDA

   ...WALTON COUNTY

AT 116 PM CST... DOPPLER RADAR AT TALLAHASSEE INDICATED A LINE OF
SEVERE THUNDERSTORMS FROM JUST EAST OF CRESTVIEW TO JUST EAST OF
VALPARAISO MOVING TO THE EAST AT 35 TO 40 MPH. THESE STORMS WILL
BE MOVING INTO WALTON COUNTY BY 125 PM CST.


WHEN THUNDERSTORMS ARE OCCURRING... PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS
PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

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 22, 8:45 AM CST, 4 hours 26 minutes earlier.

Area forecast discussion, Jan 22, 8:45 AM CST, 4 hours 26 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
945 AM EST THU JAN 22 1998

SURE IS NICE TO COME BACK AFTER THREE WEEKS AND HAVE TO DEAL WITH A
POTENTIAL SEVERE WEATHER SITUATION. KEVX RADAR SHOWS BOWING SQLN
ENTERING FAR WRN FL PNHNDL/S CTNRL AL ATTM...WHILE KTLH RADAR SHOWS
WDLY SCTD SHRA OUT AHD OF SQLN. HOWEVER...SFC WMFNT RMNS ACRS NRN
GULFMEX BASED ON LATEST OBS. KTLH RAOB SHOWS SMALL CAPE OF 500 TO
1000 J/KG FOR ELEVATED TSRA. EXPC SQLN TO CONT MOVG ENE OVR TOP OF
COOL SFC LYR AND WEAKEN...WHICH SHOULD LESSEN THREAT OF DMGG SFC
GUSTS...ALTHO POTENTIAL REMAINS FOR HAIL. FIRST INCLINATION WAS
THAT FL BIG BEND ZONES WOULD HAVE TO BE UPDATED TO RAISE PRECIP
CHC...BUT CURRENT THINKING IS THAT MAIN PRECIP WILL HOLD OFF UNTIL
EARLY EVENING. TECHNICALLY...SHOULD PROBABLY RAISE PRECIP CHC SINCE
I THINK RAIN WILL GET HERE BY 00Z...BUT SINCE NEW SET OF ZONES WILL
BE ISSUED BEFORE THEN...THINK 40 PCT SHOULD COVER IT UNTIL THEN. AS
FOR TEMPS...WILL HOPE WMFNT MAKES IT THRU SO TEMPS REACH AT LEAST
MID/UPR 60S.

MOORE

In the hours before

Special weather statement, Jan 22, 12:02 PM CST, 1 hour 9 minutes before

ALZ065>069-FLZ007-009>015-017>019-026>029-034-039-GAZ121>131-
142>148-155>161-GMZ750-755-770-775-221950-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TALLAHASSEE FL
102 PM EST THU JAN 22 1998

A TORNADO WATCH HAS BEEN ISSUED FOR THIS AFTERNOON UNTIL 7 PM
EST...6 PM CST FOR THE FLORIDA PANHANDLE...WESTERN PORTIONS OF THE
FLORIDA BIG BEND...AND EXTREME SOUTHWEST GEORGIA.

A REGION OF STRENGTHENING LOW PRESSURE IS CURRENTLY LOCATED
IN SOUTHERN MISSISSIPPI AND EASTERN LOUISANA EXTENDING INTO
THE NORTHERN GULF OF MEXICO. PRECIPITATION BOUNDARIES FROM EARLIER
SHOWERS AND THUNDERSTORMS ACROSS THE FLORIDA PANHANDLE AND
SOUTHERN ALABAMA MAKE THE CONDITIONS RIGHT FOR SEVERE WEATHER
DEVELOPMENT THIS AFTERNOON ACROSS NORTHERN FLORIDA AND EXTREME
SOUTHWEST GEORGIA.

IN ADDITION...HEAVY RAINFALL WILL ACCOMPANY THIS STORMS AND MAY
CAUSE SOME LOCAL RIVERS TO REACH FLOOD STAGE AGAIN.

SPOTTER ACTIVATION IS REQUESTED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 22, 2:11 PM CST	Severe Thunderstorm Warning	TAE	Bay	64 min

Nearby

Severe Thunderstorm Warnings in Florida, 1998 Every severe thunderstorm warning in 1998

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.