SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL ALABAMA CENTRAL MISSISSIPPI EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL 700 PM CDT

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URGENT - IMMEDIATE BROADCAST REQUESTED   SEVERE THUNDERSTORM WATCH NUMBER 552   NWS STORM PREDICTION CENTER NORMAN OK   1215 PM CDT FRI AUG 3 2012      THE NWS STORM PREDICTION CENTER HAS ISSUED A   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF              CENTRAL ALABAMA          CENTRAL MISSISSIPPI      EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL   700 PM CDT.      HAIL TO 1.5 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 50   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTH   SOUTHWEST OF GREENWOOD MISSISSIPPI TO 50 MILES NORTHEAST OF SELMA   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.      DISCUSSION...DIFFERENTIAL HEATING ON THE S EDGE OF A CLOUD BAND   ACROSS NRN MS/AL WILL PROMOTE NEW THUNDERSTORM DEVELOPMENT THIS   AFTERNOON ACROSS CENTRAL MS/AL.  STRONG INSTABILITY IS ALREADY   PRESENT ACROSS THIS AREA /MLCAPE AOA 3000 J PER KG/...AND EFFECTIVE   BULK SHEAR OF 25-30 KT WILL SUPPORT A RISK FOR ORGANIZED MULTICELL   CLUSTERS CAPABLE OF PRODUCING DAMAGING DOWNBURST WINDS AND ISOLATED   LARGE HAIL THIS AFTERNOON.      AVIATION...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 550. MEAN STORM   MOTION VECTOR 36015.