Alert archive / Florida / Tornado Watches in 1998

Tornado Watch 36

February 16, 199819 counties in Florida

The Storm Prediction Center issued this tornado watch at Feb 16, 1998, 1:00 PM EST for 19 counties in Florida. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Feb 16, 1998, 1:00 PM EST (18:00 UTC)
Expired
Feb 16, 1998, 6:00 PM EST
In force
5 hr
Issued by
the Storm Prediction Center

Counties Brevard County, FL, Citrus County, FL, Flagler County, FL, Hardee County, FL, Hernando County, FL, Hillsborough County, FL, Lake County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL

Warnings issued inside it

15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Feb 16, 1:12 PM ESTTornado WarningTBWHillsborough48 min
Feb 16, 1:18 PM ESTSevere Thunderstorm WarningTBWManatee47 min
Feb 16, 1:47 PM ESTSevere Thunderstorm WarningTBWHillsborough48 min
Feb 16, 2:25 PM ESTTornado WarningTBWPolk50 min
Feb 16, 2:38 PM ESTSevere Thunderstorm WarningTBWPolk32 min
Feb 16, 2:44 PM ESTSevere Thunderstorm WarningMLBLake, Orange66 min
Feb 16, 2:49 PM ESTTornado WarningMLBOsceola61 min
Feb 16, 3:02 PM ESTTornado WarningMLBOrange, Seminole48 min
Feb 16, 3:10 PM ESTTornado WarningMLBLake60 min
Feb 16, 3:11 PM ESTSevere Thunderstorm WarningTBWPolk49 min
Feb 16, 3:15 PM ESTTornado WarningMLBVolusia60 min
Feb 16, 3:29 PM ESTTornado WarningJAXFlagler71 min
Feb 16, 3:46 PM ESTTornado WarningMLBOrange, Seminole59 min
Feb 16, 4:22 PM ESTTornado WarningMLBBrevard43 min
Feb 16, 4:25 PM ESTTornado WarningMLBVolusia65 min

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 6.0 hours before the alert went out and 91 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 1998-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 368 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 1998-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 456 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
368 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
517 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
456 m²/s²
0-3 km storm-relative helicity
609 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.1

Open this sounding in Storm Lab

The text

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

206 
WWUS9 KMKC 161719
SEL6  
MKC WW 161719
FLZ000-162300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 36
STORM PREDICTION CENTER NORMAN OK
1219 PM EST MON FEB 16 1998

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   CENTRAL AND NORTHERN FLORIDA PENINSULA                         
   AND ADJACENT COASTAL WATERS

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 600
PM EST.

TORNADOES...HAIL TO 1 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 30 MILES SOUTHWEST OF SAINT PETERSBURG FLORIDA
TO 25 MILES EAST OF DAYTONA BEACH FLORIDA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 35.  WATCH NUMBER 35 WILL NOT BE IN EFFECT AFTER 100 PM EST.

DISCUSSION...FAVORABLE SHEAR PROFILES FOR SUPERCELLS EXPECTED TO
REMAIN IN PLACE ACROSS FL PENINSULA REMAINDER OF AFTERNOON.  WITH
MODERATE INSTABILITY  IN SOUTHERLY FLOW...ISOLATED TORNADOES ARE
LIKELY WITH STORMS AS THEY MOVE ACROSS PENINSULA.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 23040.


...HALES

284,0830 302,0803 280,0803 262,0830

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 16, 8:30 AM ESTTornado WatchSPCAlachua, Citrus, Dixie, Hernando, Hillsborough, Levy and 4 more5 hr
Feb 16, 1:15 PM ESTTornado WatchSPCCalhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more6 hr
Feb 16, 6:15 PM ESTTornado WatchSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 18 more7 hr

Nearby

Tornado Watches in Florida, 1998Every tornado watch 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.