Tornado Watch 423

Issued

Jun 24, 2012, 7:46 PM EDT (23:46 UTC)

Expired

Jun 25, 2012, 5:00 AM EDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Tampa radar (KTBW), 68 km from the middle of the area, began a volume at 23:46 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.

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

5%

One or more gusts of 65 knots or more

5%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

20%

• Mesoscale Discussion 1261Jun 24, 4:36 PM EDT
• Mesoscale Discussion 1262Jun 24, 7:01 PM EDT
• Mesoscale Discussion 1264Jun 24, 10:16 PM EDT
• Mesoscale Discussion 1265Jun 25, 12:46 AM EDT
• Mesoscale Discussion 1267Jun 25, 4:07 AM EDT

257 
WWUS20 KWNS 242350
SEL3
SPC WW 242350
FLZ000-CWZ000-250900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 423
NWS STORM PREDICTION CENTER NORMAN OK
745 PM EDT SUN JUN 24 2012

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

       WESTERN AND CENTRAL FLORIDA PENINSULA
       COASTAL WATERS

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 745 PM UNTIL
500 AM EDT.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF CROSS CITY
FLORIDA TO 30 MILES SOUTHEAST OF NAPLES FLORIDA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU3).

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...CONTINUE...WW 422...

DISCUSSION...BASED ON LATEST NHC GUIDANCE...TROPICAL STORM DEBBY IS
EXPECTED TO DRIFT SLOWLY NWD TONIGHT WITH ASSOCIATED STRONG
LOW-LEVEL WIND FIELD /AND RESULTANT SHEAR/ PERSISTING ACROSS THE
WATCH AREA.  GIVEN 0-1 KM SRH OF 250-450 M2/S2 --PER LOCAL VAD
DATA-- AND A MOIST/LOW LCL BOUNDARY LAYER...ENVIRONMENT WILL REMAIN
SUPPORTIVE OF SUPERCELLS CAPABLE OF TORNADOES.  THIS IS ESPECIALLY
THE CASE INVOF WARM FRONT --CURRENTLY FROM N OF TPA TO MLB-- WHERE
LOW-LEVEL SHEAR/VORTICITY WILL BE FURTHER ENHANCED.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 18035.


...MEAD

Tornado Watches in Florida, 2012Every tornado watch in 2012

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.