Alert archive / Florida / Tornado Warnings in 1998

Tornado Warning 42, NWS Tampa Bay, FL

March 9, 1998Highlands County, Florida

NWS Tampa Bay, FL issued this tornado warning at Mar 9, 1998, 1:34 AM EST for Highlands County, Florida. It was in force for 36 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
Mar 9, 1998, 1:34 AM EST (06:34 UTC)
Expired
Mar 9, 1998, 2:10 AM EST
In force
36 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Highlands County, FL

The watch it was issued in

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

IssuedProductOfficeLasted
Mar 9, 1:00 AM ESTTornado WatchSPC6 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 00:00Z, 6.6 hours before the alert went out and 112 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-pSkew-T log-p diagram, Tampa Bay, FL at 00:00Z on 1998-03-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1169 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 00:00Z on 1998-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 238 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1169 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
238 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
1.0
Supercell composite
4.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTBW 090634 RRA
TORTBW
FLC055-090710-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
134 AM EST MON MAR 9 1998

THE NATIONAL WEATHER SERVICE HAS ISSUED A...TORNADO WARNING
EFFECTIVE UNTIL 210 AM EST FOR

...NORTHERN HIGHLANDS COUNTY


AT 133 AM EST... NATIONAL WEATHER SERVICE DOPPLER RADAR IN RUSKIN
INDICATED A DEVELOPING TORNADO IN THE VICINITY OF AVON PARK MOVING
NORTHEAST AT 45 MPH.


DOPPLER RADAR DETECTED TORNADO MEANS THAT THERE IS STRONG
ROTATION WITHIN A STORM. THE STORM MAY NOT BE PRODUCING A TORNADO AT
THE MOMENT...BUT WILL LIKELY DURING THE WARNING PERIOD. THE STORM MAY
ALSO INCLUDE HAIL AND DAMAGING STRAIGHT LINE WIND. THOSE IN THE PATH
OF THE STORM ARE ADVISED TO TAKE COVER IMMEDIATELY.

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Mar 8, 6:00 PM EST, 7 hours 34 minutes earlier.

Area forecast discussion, Mar 8, 6:00 PM EST, 7 hours 34 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL
600 PM EST SUN MAR 8 1998

THE 18Z SOUNDING SHOWED THE ATMOSPHERE TO BE VERY
UNSTABLE...ALTHOUGH CAPPED.  SHEAR LOOKED PRETTY POTENT ALSO.  WHEN
THE LINE OVER THE EASTERN GULF PUSHES INTO OUR AREA I WOULD EXPECT IT
TO TAP THE ENERGY THAT HAS BEEN BUILDING UNDER THE CAP TODAY.  ON TOP
OF IT ALL THE LOW LEVEL JET IS IN PLACE AND STRONG.  I WOULD EXPECT THAT
THE JET WILL BE EVEN MORE FOCUSSED AFTER THE ATMOSPHERE DECOUPLES
TONIGHT.   THEREFORE WE SHOULD SEE SOME PRETTY STRONG THUNDERSTORMS
OVERNIGHT EVEN WITH THE SHORT WAVE PULLING OFF TO THE NORTH.

THE LINE WILL BE MOVING...WHICH IS A BIG ADVANTAGE THAT OUR FRIENDS TO
THE NORTH DID NOT HAVE.  THEREFORE WE MAY SEE 1 TO 3 INCH RAINFALL
TOTALS THAT WILL AGGRAVATE THE CURRENT FLOODING...I DO NOT EXPECT ANY
OF THE FLOODING TO BECOME CATASTROPHIC

I AM SURE WILL BE UPDATING THE FORECAST SEVERAL TIMES TONIGHT AS
CONDITIONS WARRANT.

SOBIEN

In the hours before

Special weather statement, Mar 9, 1:04 AM EST, 30 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-090700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
104 AM EST MON MAR 9 1998

...A TORNADO WATCH HAS BEEN REISSUED FOR HILLSBOROUGH...POLK...
MANATEE...SARASOTA...HARDEE AND DESOTO COUNTIES UNTIL 7 AM EST.

...THE TORNADO WATCH NOW ALSO INCLUDES HIGHLANDS...CHARLOTTE AND
LEE COUNTIES UNTIL 7 AM EST.

...THE TORNADO WATCH HAS EXPIRED FOR LEVY...CITRUS...SUMTER...
HERNANDO...PASCO AND PINELLAS COUNTIES.

AT 1 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS INDICATING THAT
THE LINE OF STRONG TO SEVERE THUNDERSTORMS STRETCHED FROM SOUTHERN
SUMTER AND NORTHERN POLK COUNTIES...SOUTHWEST TO SARASOTA COUNTY AND
THEN EXTENDING OFFSHORE INTO THE GULF OF MEXICO. THIS LINE WAS
MOVING EAST AT 20 TO 25 MPH...BUT INDIVIDUAL STORMS WITHIN THIS LINE
WERE MOVING NORTHEAST AT 40 TO 50 MPH.

REMEMBER THAT A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR
THE DEVELOPMENT OF TORNADOES.

MORALES

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 10:25 PM ESTSevere Thunderstorm WarningTBWHernando, Pasco55 min
Mar 8, 11:51 PM ESTTornado WarningTBWPasco44 min
Mar 9, 12:29 AM ESTSevere Thunderstorm WarningTBWManatee, Sarasota51 min
Mar 9, 12:34 AM ESTSevere Thunderstorm WarningTBWHillsborough, Polk51 min
Mar 9, 12:52 AM ESTSevere Thunderstorm WarningTBWHardee48 min
Mar 9, 1:24 AM ESTSevere Thunderstorm WarningTBWHighlands, Polk46 min
Mar 9, 1:29 AM ESTSevere Thunderstorm WarningTBWCharlotte, Sarasota46 min
Mar 9, 1:32 AM ESTTornado WarningTBWPolk33 min

Nearby

Tornado Warnings in Florida, 1998Every tornado warning in 1998Tornadoes 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.