Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 225, NWS Mobile, AL

August 28, 1997Okaloosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Aug 28, 1997, 6:55 PM CDT for Okaloosa County, Florida. It was in force for 65 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: Aug 28, 1997, 6:55 PM CDT (23:55 UTC)
Expired: Aug 28, 1997, 8:00 PM CDT
In force: 65 min
Issued by: NWS Mobile, AL
Area: Whole counties

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 65 km from the middle of the area, began a volume at 23:57 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
Aug 28, 7:55 PM CDT	Thunderstorm Wind 50	Ft Walton Beach, FL	Trees and power poles were blown down in Fort Walton Beach.

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, 11.9 hours before the alert went out and 22 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: 1069 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 921 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 22 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 KMOB 282354 RRA
SVRMOB
FLC091-290100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
655 PM CDT THU AUG 28 1997
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST FLORIDA
 
   ...OKALOOSA COUNTY
 
AT 647 PM CDT MOBILE DOPPLER WEATHER RADAR INDICATED A SEVERE
THUNDERSTORM OVER SOUTHERN OKALOOSA COUNTY FLORIDA NORTH OF HIGHWAY 98.
AN AMATEUR RADIO OPERATOR IN OKALOOSA COUNTY REPORTED QUARTER-SIZE HAIL
FALLING NEAR HURLBURT FIELD. LARGE HAIL...GUSTY WINDS AND HEAVY RAINFALL
IS POSSIBLE WITH THIS THUNDERSTORM. THIS THUNDERSTORM IS MOVING TO THE
SOUTHWEST AT 10 MPH.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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.