Alert archive / Florida / Tornado Warnings in 1998

Tornado Warning 61, NWS Tampa Bay, FL

September 2, 1998Sumter County, Florida

NWS Tampa Bay, FL issued this tornado warning at Sep 2, 1998, 5:20 PM EDT for Sumter County, Florida. It was in force for 25 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
Sep 2, 1998, 5:20 PM EDT (21:20 UTC)
Expired
Sep 2, 1998, 5:45 PM EDT
In force
25 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Sumter County, FL

The radar

The Tampa radar (KTBW), 116 km from the middle of the area, began a volume at 21:20 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 watch it was issued in

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

IssuedProductOfficeLasted
Sep 2, 3:00 PM EDTTornado WatchSPC8 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 9.3 hours before the alert went out and 116 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 12:00Z on 1998-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 207 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 12:00Z on 1998-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.193958Sfc1 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
207 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1215 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

685 
WFUS1 KTBW 022121 RRA
TORTBW
FLC119-022145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
520 PM EDT WED SEP 2 1998

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS EXTENDED THE

* TORNADO WARNING FOR...
  SUMTER COUNTY IN CENTRAL FLORIDA

* UNTIL 545 PM EDT

* AT 518 PM...TORNADOES WERE INDICATED BY DOPPLER RADAR NEAR
  WILDWOOD AND JUST SOUTH OF CENTER HILL. THE TORNADOES WER MOVING TO
  THE NORTHEAST AT 25 MPH.

* SOME LOCATIONS AFFECTED...
  WILDWOOD AROUND 520 PM
  OXFORD AROUND 530 PM
  CENTER HILL AROUND 530 PM

A DOPPLER RADAR DETECTED TORNADO MEANS A TORNADO MAY NOT BE
OCCURRING AT THE MOMENT...BUT WILL LIKELY DO SO DURING THE WARNING
PERIOD. TAKE COVER IN A STURDY BUILDING. MOBILE HOMES AND CARS ARE
NOT SAFE.

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 Sep 2, 2:20 PM EDT, 3 hours earlier.

Area forecast discussion, Sep 2, 2:20 PM EDT, 3 hours before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA / RUSKIN FL
220 PM EDT WED SEP 2 1998

CURRENTLY...88D SHOWING TWO SEPARATE REGIMES OF WX GOING ON. A LARGE
AREA OF SHWS/TSTMS...ORIENTED NE/SW OVER THE N FA HAS BEEN IN PLACE
SINCE LAST NIGHT...WHICH HAS BECMG AN EXTENSION OF THE MAIN RAIN BAND
IN NE QUAD OF EARL. MORE SCT CONVECTION HAS BEEN DEVELOPING SOUTH OF
THIS AREA OVER THE CENT AND S FA. CONDITIONS HAVE BEEN BECMG MORE
CONDUCIVE FOR ISOLD TORNADOES...AND HAVE JUST ISSUED TOR FOR HARDEE.
AT THE SFC...WINDS HAVE BEEN INCREASING FROM THE ESE NORTH OF TPA...AND
SSW SOUTH OF TPA. THIS HAS SET UP A SHEAR/CONFLUENT ZONE OVER SCENT FA...
WHICH MAY BECMG FOCUSING AREA FOR ISOLD SVR/TORS.

FCST...ALTHO IT'S A MUTE POINT TO DISCUS MODEL DIFFERENCES WITH EARL...
IT IS INTERESTING TO NOTE THAT THE NGM SEEMS TO BE THE ONLY MODEL THAT
PREDICTS A CONTINUED NE PROGRESSION INTO THE PANHANDLE AND S GA BY
THU...IN LINE WITH NHC'S FORECAST. ETA AND AVN ARE MUCH SLOWER...WITH
THE AVN ACTUALLY KEEPING THE STORM STILL SOUTH OF LA THRU 60 HRS.

TIDES HAVE NOT BEEN GOING DOWN...AND ARE RUNNING ABT 1-1.5 FT ABV NORM.
SEE LATEST HLS FOR SPECIFIC SURGE FORECASTS. EXPECT TIDE LEVELS TO
CONTINUE RISING OVER NIGHT. TS WARNING COVERS TIDAL EFFECTS FROM LEVY
COUNTY TO PASCO...COASTAL FLOOD WATCH STILL IN PLACE FROM PINELLAS CO TO
SARASOTA.

RAINFALL...MAY NEED TO ADD FLOOD WATCH FOR TONIGHT FOR HERNANDO SUMTER
NORTH. CAT POPS TONIGHT OVER N FA WITH EMBEDDED TSTMS...LIKELY CENT
AND SOUTH. ON THU...LIKELY N FA WITH GOOD CHC/LIKELY REST OF FA.

USING NHC FCST...EXPECT WINDS TO REMAIN RATHER GUSTY TONIGHT...ESPEC OVER
GULF WATERS...WHERE GUST OF 40 TO 50 KTS NOT OUT OF THE QU
ESTIONS OFSHR
AND NE GULF WATERS. WINDS SHUD GRAD DECREASE LATER ON THU AS THEY VEER
TO MORE SW.

MORALES

In the hours before

Special weather statement, Sep 2, 12:22 PM EDT, 4 hours 58 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-022100-

WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1222 PM EDT WED SEP 2 1998

...ISOLATED TORNADOES POSSIBLE TODAY FROM TAMPA BAY NORTH...
...SLOWLY RISING TIDES EXPECTED LATER TODAY THROUGH TONIGHT...

A LARGE AREA OF SHOWERS AND THUNDERSTORMS OVER THE EASTERN AND
NORTHEASTERN GULF OF MEXICO ALONG THE EASTERN EDGE OF HURRICANE
EARL...HAS BEEN INCREASING IN AREA AND STRENGTH. A LINE OF
STRONGER THUNDERSTORMS EMBEDDED WITHIN THE RAIN AREA WAS LOCATED
OVER THE NORTHEASTERN GULF AT 1215 PM EDT. WITHIN THIS LINE OF
THUNDERSTORMS...CONDITIONS MAY BECOME FAVORABLE FOR THE DEVELOPMENT
OF ISOLATED WATERSPOUTS. IF THIS LINE HOLDS TOGETHER AS IT APPROACHES
THE SHORE...THERE COULD ALSO BE THE POTENTIAL FOR ISOLATED
TORNADOES...ESPECIALLY FROM LEVY COUNTY...SOUTH TO PINELLAS COUNTY.

BESIDES THE THREAT OF ISOLATED TORNADOES...STRONGER STORMS WILL
LIKELY PRODUCE GUSTY WINDS OF 30 TO 40 MPH AND FREQUENT CLOUD TO
GROUND LIGHTNING.

TIDES ALONG COASTAL LOCATIONS FROM THE SUWANNEE RIVER...SOUTH TO
ENGLEWOOD ARE ALSO EXPECTED TO SLOWLY RISE. AS OF 12 PM EDT...TIDES
APPEARED TO BE RUNNING ABOUT ONE TO ONE AND ONE HALF FEET ABOVE
NORMAL. ALTHOUGH THE ASTRONOMICAL TIDES ARE SUPPOSED TO BE FALLING
TO A LOW TIDE BY LATE THIS AFTERNOON AND EARLY EVENING...IT IS
LIKELY THAT TIDES WILL LIKELY NOT FALL MUCH...AND MAY CONTINUE TO
SLO2WLY RISE THROUGH THE DAY.

RESIDENTS ALONG COASTAL LOCATIONS SHOULD CONTINUE TO MONITOR WATER
LEVELS ALONG THE COAST...AND BE PREPARED TO MOVE TO HIGHER GROUND IF
NECESSARY.

MORALES
Special weather statement, Sep 2, 12:22 PM EDT, 4 hours 58 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-022100-

WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1222 PM EDT WED SEP 2 1998

...ISOLATED TORNADOES POSSIBLE TODAY FROM TAMPA BAY NORTH...
...SLOWLY RISING TIDES EXPECTED LATER TODAY THROUGH TONIGHT...

A LARGE AREA OF SHOWERS AND THUNDERSTORMS OVER THE EASTERN AND
NORTHEASTERN GULF OF MEXICO ALONG THE EASTERN EDGE OF HURRICANE
EARL...HAS BEEN INCREASING IN AREA AND STRENGTH. A LINE OF
STRONGER THUNDERSTORMS EMBEDDED WITHIN THE RAIN AREA WAS LOCATED
OVER THE NORTHEASTERN GULF AT 1215 PM EDT. WITHIN THIS LINE OF
THUNDERSTORMS...CONDITIONS MAY BECOME FAVORABLE FOR THE DEVELOPMENT
OF ISOLATED WATERSPOUTS. IF THIS LINE HOLDS TOGETHER AS IT APPROACHES
THE SHORE...THERE COULD ALSO BE THE POTENTIAL FOR ISOLATED
TORNADOES...ESPECIALLY FROM LEVY COUNTY...SOUTH TO PINELLAS COUNTY.

BESIDES THE THREAT OF ISOLATED TORNADOES...STRONGER STORMS WILL
LIKELY PRODUCE GUSTY WINDS OF 30 TO 40 MPH AND FREQUENT CLOUD TO
GROUND LIGHTNING.

TIDES ALONG COASTAL LOCATIONS FROM THE SUWANNEE RIVER...SOUTH TO
ENGLEWOOD ARE ALSO EXPECTED TO SLOWLY RISE. AS OF 12 PM EDT...TIDES
APPEARED TO BE RUNNING ABOUT ONE TO ONE AND ONE HALF FEET ABOVE
NORMAL. ALTHOUGH THE ASTRONOMICAL TIDES ARE SUPPOSED TO BE FALLING
TO A LOW TIDE BY LATE THIS AFTERNOON AND EARLY EVENING...IT IS
LIKELY THAT TIDES WILL LIKELY NOT FALL MUCH...AND MAY CONTINUE TO
SLO2WLY RISE THROUGH THE DAY.

RESIDENTS ALONG COASTAL LOCATIONS SHOULD CONTINUE TO MONITOR WATER
LEVELS ALONG THE COAST...AND BE PREPARED TO MOVE TO HIGHER GROUND IF
NECESSARY.

MORALES

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 3:18 PM EDTTornado WarningTBWPasco57 min
Sep 2, 3:27 PM EDTTornado WarningTBWHillsborough18 min
Sep 2, 3:31 PM EDTTornado WarningTBWHernando29 min
Sep 2, 3:56 PM EDTTornado WarningTBWHernando34 min
Sep 2, 3:58 PM EDTTornado WarningTBWCitrus47 min
Sep 2, 4:31 PM EDTTornado WarningTBWHernando, Sumter49 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; radar from the NEXRAD Level II archive.