Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 3, NWS Jacksonville, FL

January 16, 1997Columbia County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jan 16, 1997, 4:33 AM EST for Columbia County, Florida. It was in force for 57 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 16, 1997, 4:33 AM EST (09:33 UTC)
Expired: Jan 16, 1997, 5:30 AM EST
In force: 57 min
Issued by: NWS Jacksonville, FL
Area: Whole counties

County Columbia 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 16, 3:45 AM EST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 9.6 hours before the alert went out and 94 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: 2 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 281 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 KJAX 160934
SVRJAX
FLC023-161030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
433 AM EST THU JAN 16 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 AM EST
FOR PERSONS IN THE FOLLOWING LOCATIONS...
 
IN NORTH FLORIDA
 
   ...COLUMBIA COUNTY
 
AT 433 AM EDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR THE
COUNTY BORDER MOVING EAST AT 40 MPH. THIS STORM WILL BE MOVING INTO LAKE
CITY BY 445 AM. THIS STORM WILL LIKLEY BY ACCOMPANIED BY STRONG AND
DAMAGING WINDS.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLYr DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
PP

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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 16, 2:11 AM EST, 2 hours 22 minutes earlier.

Area forecast discussion, Jan 16, 2:11 AM EST, 2 hours 22 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
210 AM EST THU JAN 16 1997

WSR 88D FROM TLH SHOWNG BOW ECHO JUST WEST OF TLH MOVG EAST AT 40 TO
50 KTS. AT PRESENT RATE WILL MOVE INTO WEST PART OF CWA BY 09Z AND
EAST PART BY 11-12Z. BOW MAY BEGIN TO WEAKEN AS IT HEADS INTO ENVIRONMENT
LESS FAVORABLE FOR SEVERE WX. MODELS SHOW LOW LEVEL 60 KT JET RACES NE
TOWARDS CAROLINAS WITH 40 KT JET ACROSS S GA. APPEARS BEST CHC FOR SVR
WX WILL BE WEST PART OF CWA. WILL RAISE POPS FOR EARLY FIRST PERIOD WITH
APPROACH OF SQUALL/BOW ECHOE. WILL MOVE FIRST COLD FRONT INTO CWA 16-18Z
TODAY AND ARCTIC FRONT 06-09Z TONIGHT. TEMPS SHOULD RECOVER TODAY BUT
DROP LIKE A ROCK TONIGHT AFTER SECOND FRONT MOVES IN.

PRELIM
SSI TB 065/028 047/027 08600
JAX TB 067/028 048/026 08600
GNV TB 068/029 049/027 08600

PETERSON

In the hours before

Special weather statement, Jan 16, 4:06 AM EST, 27 minutes before

FLZ020>025-030>033-035>038-040-501-
GAZ132>136-149>154-162>166-501-161830-

SOUTHEAST GEORGIA AND NORTHEAST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
405 AM EST THU JAN 16 1997

...A TORNADO WATCH IS IN EFFECT FOR ALL OF NORTHEAST FLORIDA UNTIL
9 AM...

 A LINE OF STRONG TO SEVERE THUNDERSTORMS WILL MOVE RAPIDLY EAST ACROSS
NORTHEAST FLORIDA EARLY THIS MORNING. THE MAIN THREAT FROM THESE STORMS
WILL BE DAMAGING WINDS AND POSSIBLE TORNADOES. THE ACTIVITY WILL BEGIN
TO MOVE OFF THE COAST BY AFTER 8 AM AND SHOULD BE WELL OFFSHORE BY LATE
MORNING. MARINE INTERESTS SHOULD SEEK SAFE HARBOR.

MUCH COLDER WEATHER WILL MOVE INTO THE AREA TONIGHT AS AN ARCTIC COLD
FRONT MOVES THROUGH. LOWS FRIDAY MORNING WILL BE IN THE UPPER 20S TO
LOWER 30S WITH WIND CHILLS IN THE TEENS AND SINGLE DIGITS.

STORM SPOTTERS AND EMERGENCY MANAGEMENT IN NORTHEAST FLORIDA WILL BE
ACTIVATED THIS MORNING. SPOTTERS IN SOUTHEAST GEORGIA SHOULD
REMAIN ALERT FOR POSSIBLE ACTIVATION.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 16, 3:36 AM EST	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	69 min
Jan 16, 6:10 AM EST	Tornado Warning	JAX	Clay, Saint Johns	65 min
Jan 16, 6:23 AM EST	Severe Thunderstorm Warning	JAX	Duval	67 min
Jan 16, 6:53 AM EST	Tornado Warning	JAX	Putnam	52 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; the sounding from the Mesonet's radiosonde archive.