SEVERE THUNDERSTORM WATCH NUMBER 122

URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 122
   NWS STORM PREDICTION CENTER NORMAN OK
   505 PM CDT SAT MAR 31 2012
  
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  
          PARTS OF NORTHERN AND CENTRAL ALABAMA
  
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 505 PM UNTIL
   900 PM CDT.
  
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
  
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 85 MILES WEST
   NORTHWEST OF BIRMINGHAM ALABAMA TO 30 MILES NORTHEAST OF ANNISTON
   ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
  
   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
   FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
   DO PRODUCE TORNADOES.
  
   OTHER WATCH INFORMATION...CONTINUE...WW 121...
  
   DISCUSSION...A CLUSTER OF MULTICELLS AND EMBEDDED SUPERCELLS WILL
   CONTINUE TO SPREAD SWD FROM NRN TOWARD CENTRAL AL THROUGH THIS
   EVENING.  MODERATE INSTABILITY AND EFFECTIVE BULK SHEAR AOA 30 KT
   WILL MAINTAIN A RISK FOR ORGANIZED STORMS CAPABLE OF PRODUCING LARGE
   HAIL/DAMAGING WINDS...PRIOR TO THE LOSS OF DAYTIME HEATING AND
   STABILIZATION OF THE BOUNDARY LAYER BY EARLY TONIGHT.
  
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 35020.