Increasing Tornado Threat this morning
Posted by JAC on 12/2/2009, 7:07 am



MESOSCALE DISCUSSION 2184
  NWS STORM PREDICTION CENTER NORMAN OK
  0502 AM CST WED DEC 02 2009
 
  AREAS AFFECTED...SRN AL...FL PANHANDLE...SWRN GA
 
  CONCERNING...TORNADO WATCH 787...
 
  VALID 021102Z - 021200Z
 
  THE SEVERE WEATHER THREAT FOR TORNADO WATCH 787 CONTINUES.
 
  TORNADO THREAT APPEARS TO BE INCREASING ALONG THE GULF COAST
  IMMEDIATELY AHEAD OF ADVANCING SQUALL LINE.  MARITIME TROPICAL
  AIRMASS IS POSITIONED JUST OFFSHORE BUT IS GRADUALLY LIFTING NWD AND
  MAY SOON SPREAD INLAND ALLOWING UPPER 60S TO NEAR 70F DEW POINTS TO
  RETURN ACROSS SRN PORTIONS OF TORNADO WATCH.  LATEST RADAR DATA
  SUPPORTS THIS AIRMASS TRANSITION WITH MORE DISCRETE SUPERCELL
  STRUCTURES NOTED OVER THE NRN GULF OF MEXICO.  ONE STRONG SUPERCELL
  IS LOCATED ROUGHLY 35 MI SW OF PFN...LIFTING NEWD AT 30-35KT.  GIVEN
  THIS SPEED A POTENTIALLY TORNADIC STORM COULD MOVE ONSHORE IN BAY
  COUNTY AROUND 12Z.  NEEDLESS TO SAY...TORNADOIC THREAT WILL ONLY
  INCREASE DURING THE MORNING AS INSTABILITY INCREASES WITHIN
  IMPRESSIVE LOW LEVEL-MID LEVEL SHEAR ENVIRONMENT.
 
  ..DARROW.. 12/02/2009






URGENT - IMMEDIATE BROADCAST REQUESTED
  TORNADO WATCH NUMBER 787
  NWS STORM PREDICTION CENTER NORMAN OK
  310 AM CST WED DEC 2 2009
 
  THE NWS STORM PREDICTION CENTER HAS ISSUED A
  TORNADO WATCH FOR PORTIONS OF
 
         SOUTHERN ALABAMA
         FLORIDA PANHANDLE
         SOUTHWESTERN GEORGIA
         COASTAL WATERS
 
  EFFECTIVE THIS WEDNESDAY MORNING FROM 310 AM UNTIL 1000 AM CST.
 
  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 20 MILES SOUTH OF MOBILE
  ALABAMA TO 35 MILES NORTHEAST OF TALLAHASSEE FLORIDA.  FOR A
  COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
  UPDATE (WOUS64 KWNS WOU7).
 
  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...THREAT FOR ISOLATED TORNADOES AND DAMAGING WINDS WILL
  RAMP-UP EARLY THIS MORNING AND CONTINUE EWD TODAY AS IMPACTS OF
  APPROACHING STRONG MID/UPPER LEVEL SYSTEM INCREASES TSTMS ACROSS WW.
   ACTIVITY WILL LIKELY EVOLVE AS A BROKEN SQUALL LINE AND PROGRESS
  EWD ACROSS WW THROUGH THE MID TO LATE MORNING...WITH ADDITIONAL
  ISOLATED TSTMS CONTINUING TO MOVE ONSHORE IN ADVANCE OF THIS LINE.
  LOW AND DEEP LAYER SHEAR REMAINS VERY STRONG AND WILL BE SUPPORTIVE
  OF SUPERCELLS AND BOWING LINE SEGMENTS...WITH SEVERE/TORNADO THREAT
  INCREASING AS BOUNDARY LAYER MOISTENING/HEATING OCCURS THIS MORNING.
 
 
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Worse than Ida? Gulf Storm forecast for Tuesday/Wednesday - AlligatorPointer, 11/29/2009, 12:06 am
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