Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 85, NWS Tampa Bay, FL

June 25, 1997Sarasota County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 25, 1997, 3:31 PM EDT for Sarasota County, Florida. It was in force for 44 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: Jun 25, 1997, 3:31 PM EDT (19:31 UTC)
Expired: Jun 25, 1997, 4:15 PM EDT
In force: 44 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Sarasota County, FL

The radar

The Tampa radar (KTBW), 58 km from the middle of the area, began a volume at 19:34 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

Tampa Bay, FL (KTBW), launched 12:00Z, 7.5 hours before the alert went out and 58 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: 1011 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 37 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.

736 
WUUS1 KTBW 251932 RRA
SVRTBW
FLC115-252015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
331 PM EDT WED JUN 25 1997
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL FLORIDA
 
   ...SARASOTA COUNTY
 
AND THE ADJACENT COASTAL WATERS ALONG THE FLORIDA WEST COAST
 
 
AT 330 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS INDICATING A
DEVELOPING SEVERE THUNDERSTORM ABOUT 12 MILES SOUTHEAST OF SARASOTA.
THIS STORM WAS MOVING NORTH AT 15 MPH.
 
BY DEFINITION...SEVERE THUNDERSTORMS HAVE WINDS OF 58 MPH OR GREATER
AND/OR DIME SIZE HAIL OR LARGER. MOBILE HOMES ARE NOT SAFE IF THIS
STORM APPROACHES YOUR AREA...GO TO A REINFORCED BUILDING AND STAY
THERE UNTIL THE STORM PASSES.
 
THE NATIONAL WEATHER SERVICE IN RUSKIN REQUESTS THAT SKYWARN UNITS IN
THE COUNTY BE ACTIVATED AND FORWARD ALL SIGNIFICANT WEATHER REPORTS
TO OUR OFFICE.

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 Tampa Bay, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 25, 2:45 PM EDT, 46 minutes earlier.

Area forecast discussion, Jun 25, 2:45 PM EDT, 46 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL
245 PM EDT WED JUN 25 1997

CONVECTION ALREADY DVLPG OVR PENINSULA. EXPECT CONDITIONS SIMILAR TO
YDA WITH STG STORMS...WITH GUSTY WINDS AND HEAVIER RAIN...OVR SOME
LOCATIONS...AND EVENT ENDING BY 0Z. SOME FOG PSBL OVERNIGHT DUE TO
LIGHTER WINDS AND LOW LVL MSTR...HWR FOG TYPICALLY NOT AS PREVALENT
DRG SUMMER MORNINGS.

WATER VAPOR/MODEL INITIALIZATIONS REVEAL PROGRESSIVE PATTERN OVR NRN
U.S. WITH UPR RDG OVR SERN U.S.  THE DISTURBANCE NEAR THE GREAT LAKES
IS PROGD TO MOV ESE ACRS THE ERN U.S. AND AN ASSOCIATED SFC TROF WL
MOV ACRS THE ERN/SERN U.S. AND FORCE THE SFC RDG AXIS SWD INTO CNTRL
FL LATER IN THE PD...WHICH MAY MINIMIZE AFTN CONVECTION OVR THE EXTREME
NRN FA. FWC POPS ARE TOO LOW. 50% FOR THUR OVER THE FA IS APPROPRIATE.

11

In the hours before

Special weather statement, Jun 25, 11:15 AM EDT, 4 hours 16 minutes before

FLZ039-042-043-048>052-055>057-060>062-065-504-505-251900-
WEST CENTRAL AND SOUTHWEST FLORIDA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
1115 AM EDT WED JUN 25 1997

   ...STRONG THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING...

THE ATMOSPHERE REMAINS MOIST AND UNSTABLE OVER WEST CENTRAL AND
SOUTHWEST FLORIDA AND INSTABILITY IS EXPECTED TO INCREASE TODAY.
THIS AFTERNOON...THE SEA BREEZE WILL DEVELOP AND COMBINE WITH
MOISTURE AND INSTABILITY TO TRIGGER SCATTERED TO NUMEROUS SHOWERS
AND THUNDERSTORMS OVER THE AREA.

SOME STORMS OVER WEST CENTRAL AND SOUTHWEST FLORIDA MAY BECOME
STRONG AND PRODUCE SURFACE WIND GUSTS TO 45 MPH. IN ADDITION...
RAINFALL RATES OF 1 TO 2 INCHES PER HOUR IS POSSIBLE.

RESIDENTS AND MARINERS OVER WEST CENTRAL AND SOUTHWEST FLORIDA
SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. RESIDENTS
SHOULD SEEK A REINFORCED BUILDING WHILE MARINERS SHOULD RETURN TO
SAFE HARBOR IF THREATENING WEATHER APPROACHES. LISTEN TO NOAA
WEATHER RADIO...RADIO...TELEVISION...OR CABLE TELEVISION FOR THE
LATEST WEATHER INFORMATION.

EMERGENCY MANAGEMENT OFFICIALS AND STORM SPOTTERS ARE ASKED TO
REPORT ADVERSE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RUSKIN FLORIDA.

COLLINS

Local storm report, Jun 25, 1:30 PM EDT, 2 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
130 PM EDT WED JUN 25 1997

...ALL TIMES IN EST...

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

345 PM EST RUSKIN                    FL   WIND DAMAGE
06/24/97   HILLSBOROUGH                   TREE DOWN 21TH ST AND
                                          14 AV. PALM TREE THROUGH
                                          ROOF AT 2121 18TH ST.
                                          FROM HILLSBOROUGH COUNTY SO.

RKR

Local storm report, Jun 25, 1:46 PM EDT, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
130 PM EDT WED JUN 25 1997

...ALL TIMES IN EST...

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

345 PM EST RUSKIN                    FL   WIND DAMAGE
06/24/97   HILLSBOROUGH                   TREE DOWN 21TH ST AND
                                          14 AV. PALM TREE THROUGH
                                          ROOF AT 2121 18TH ST.
                                          FROM HILLSBOROUGH COUNTY SO.

RKR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 5:22 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pinellas	53 min
Jun 25, 5:28 PM EDT	Severe Thunderstorm Warning	TBW	Hardee	32 min
Jun 25, 5:58 PM EDT	Severe Thunderstorm Warning	TBW	Pasco	47 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; radar from the NEXRAD Level II archive.