April 27: PDS Tornado Watch #2

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.