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Tornado Watch 154
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WW0154 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 154
   NWS STORM PREDICTION CENTER NORMAN OK
   615 AM EDT TUE APR 14 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL AND NORTHERN FLORIDA
          COASTAL WATERS
   
   EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 615 AM UNTIL
   200 PM EDT.
   
   TORNADOES...HAIL TO 1.5 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 65 STATUTE
   MILES EITHER SIDE OF A LINE FROM 35 MILES SOUTHEAST OF DAYTONA
   BEACH FLORIDA TO 30 MILES NORTHWEST OF SAINT PETERSBURG FLORIDA. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU4).
   
   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...TSTMS IN THE NERN GULF OF MEXICO APPEAR TO BE AT LEAST
   PARTLY ASSOCIATED WITH ENHANCED ASCENT ON SRN FRINGE OF SHORTWAVE
   IMPULSE NOW ROUNDING BASE OF OH VLY TROUGH.  STRENGTHENING SW
   FLOW/LOW LVL MOISTENING AHEAD OF STORM CLUSTER EXPECTED TO MAINTAIN
   THE STORMS AS THEY CONTINUE GENERALLY E IN MEAN WLY FLOW. 
   ADDITIONAL STORMS MAY FORM AHEAD OF CLUSTER AS WAA INCREASES ATOP
   SHALLOW COOL DOME OVER NRN HALF OF FL.  STRENGTH OF SHEAR AND
   QUALITY OF MOISTURE SUGGEST POTENTIAL FOR ISOLD TORNADOES...GIVEN
   PRESENCE OF SUSTAINED STORMS AND/OR FAVORABLE STORM INTERACTIONS. 
   OTHERWISE...SETUP APPEARS FAVORABLE FOR EMBEDDED ROTATING
   STORMS/BOWING SEGMENTS WITH HIGH WIND/HAIL.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 26035.
   
   
   ...CORFIDI
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Page last modified: April 14, 2009
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