Tornado Watch 80

Issued

Mar 31, 2011, 6:00 AM EDT (10:00 UTC)

Expired

Mar 31, 2011, 1:00 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Tampa radar (KTBW), 79 km from the middle of the area, began a volume at 10:00 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

60%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 320Mar 31, 4:40 AM EDT
• Mesoscale Discussion 321Mar 31, 9:39 AM EDT
• Mesoscale Discussion 322Mar 31, 12:12 PM EDT

216 
WWUS20 KWNS 311001
SEL0
SPC WW 311001
FLZ000-CWZ000-311700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 80
NWS STORM PREDICTION CENTER NORMAN OK
600 AM EDT THU MAR 31 2011

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

       LARGE PORTION OF THE FLORIDA PENINSULA
       COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 600 AM UNTIL
100 PM EDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF OCALA
FLORIDA TO 55 MILES WEST SOUTHWEST OF WEST PALM BEACH FLORIDA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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.

DISCUSSION...STORMS OVER NERN GULF JUST OFF FL COAST HAVE
INTENSIFIED WITH THE APP ROCH OF STRONG UPPER TROUGH GULF STATES AND
DEEPENING SURFACE LOW.  SHEAR PROFILES ARE NOW SUPPORTIVE OF
SUPERCELLS AND TORNADO POTENTIAL WITH 40 KT LOW LEVEL JET AND
APPROACHING 60-70KT MID LEVEL JET.  SQUALL LINE WITH EMBEDDED
SUPERCELLS SHOULD CROSS NRN FL PENINSULA THIS MORNING ACCOMPANIED BY
WIND DAMAGE POTENTIAL AND POSSIBLE TORNADOES.  ACTIVITY WILL WORK
SEWD TOWARD SRN HALF OF PENINSULA DURING THE MORNING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 25040.


...HALES

Tornado Watches in Florida, 2011Every tornado watch in 2011

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.