PDS Posted - Classic Tornado Outbreak
Posted by JAC on 4/27/2011, 2:52 pm



URGENT - IMMEDIATE BROADCAST REQUESTED
  TORNADO WATCH NUMBER 235
  NWS STORM PREDICTION CENTER NORMAN OK
  145 PM CDT WED APR 27 2011
 
  THE NWS STORM PREDICTION CENTER HAS ISSUED A
  TORNADO WATCH FOR PORTIONS OF
 
         MUCH OF ALABAMA
         NORTHWEST GEORGIA
         SOUTHEAST MISSISSIPPI
         SOUTHERN MIDDLE TENNESSEE
 
  EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 145 PM UNTIL
  1000 PM CDT.
 
  ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
 
  DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER...
  THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
  POSSIBLE IN THESE AREAS.
 
  THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
  MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF
  HUNTSVILLE ALABAMA TO 60 MILES WEST SOUTHWEST OF EVERGREEN
  ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
  ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
 
  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 230...WW 231...WW
  232...WW 233...WW 234...
 
  DISCUSSION...A CLASSIC TORNADO OUTBREAK SITUATION IS DEVELOPING
  ACROSS MUCH OF AL AS DISCRETE TORNADIC SUPERCELLS FORM OVER MS AND
  TRACK ACROSS THE WATCH AREA.  STRONG LOW LEVEL AND DEEP LAYER
  VERTICAL SHEAR...COMBINED WITH A MOIST AND MODERATELY UNSTABLE AIR
  MASS...WILL POSE A DANGEROUS RISK OF STRONG/VIOLENT AND POTENTIALLY
  LONG-TRACK TORNADOES.
 
  AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
  SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
  WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
  500. MEAN STORM MOTION VECTOR 25040.
 
 
  ...HART
52
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High Risk today N AL, SE TN, N GA - JAC, 4/27/2011, 5:46 am
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