URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 29
NWS STORM PREDICTION CENTER NORMAN OK
1100 AM EST THU MAR 11 2010

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

       MUCH OF CENTRAL FLORIDA PENINSULA
       COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1100 AM UNTIL
600 PM EST.

TORNADOES...HAIL TO 1 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 65 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST NORTHWEST OF
SAINT PETERSBURG FLORIDA TO 30 MILES EAST NORTHEAST OF MELBOURNE
FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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...STRONG/VEERING SHEAR PROFILES COUPLED WITH A MOIST AND
MODESTLY UNSTABLE AIR MASS WILL SUPPORT SUPERCELL DEVELOPMENT MOVING
EWD OFF GULF ACROSS CENTRAL FL.  PRIMARY THREAT WILL BE TORNADOES
ASSOCIATED WITH ANY SUPERCELL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

STATUS FOR WATCH 0029 HAS NOT BEEN ISSUE YET

DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1134 AM CST THU MAR 11 2010

VALID 121200Z - 131200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PORTIONS OF THE SERN
STATES...

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS S FL...

...SYNOPSIS...
CENTROID OF CLOSED/EXTENSIVE LONGWAVE TROUGH WILL SLOWLY PIVOT
ESEWD OVER THE LOWER MO/MIDDLE MS RIVER VALLEYS TO THE MID SOUTH ON
FRIDAY.  MEANWHILE...DETERMINISTIC MODELS AGREE THAT A SRN PERIPHERY
SHORTWAVE TROUGH WILL PROGRESS NEWD FROM THE LOWER MS VALLEY THROUGH
THE TN VALLEY/LOWER OH VALLEY FRIDAY AFTERNOON...AND THEN TRACK WWD
TOWARD NRN MO IN NRN PERIPHERY OF LARGER CLOSED LOW.  SRN EXTENT OF
THE LOWER MS VALLEY SHORTWAVE TROUGH WILL MOVE EWD THROUGH THE
CENTRAL/NERN GULF COAST STATES TO OFF THE SRN ATLANTIC COAST BY 12Z
SATURDAY.  THE EVOLUTION OF THE UPPER LEVEL FEATURES EAST OF THE
ROCKIES WILL OCCUR IN CONJUNCTION WITH PHASING POLAR/SUBTROPICAL