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Severe Thunderstorm Watch 73
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WW0073 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL3
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 73
   NWS STORM PREDICTION CENTER NORMAN OK
   145 AM CST FRI FEB 22 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL ALABAMA
          CENTRAL MISSISSIPPI
   
   EFFECTIVE THIS FRIDAY MORNING FROM 145 AM UNTIL 700 AM CST.
   
   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 45
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST
   SOUTHWEST OF JACKSON MISSISSIPPI TO 35 MILES NORTH OF AUBURN
   ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   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...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 71. WATCH NUMBER 71 WILL NOT BE
   IN EFFECT AFTER 145 AM CST. CONTINUE...WW 72...
   
   DISCUSSION...A BAND OF ELEVATED THUNDERSTORMS WILL SPREAD EWD/NEWD
   OVER CENTRAL MS/AL IN ADVANCE OF A MID LEVEL TROUGH EJECTING ENEWD
   FROM LA.  GRADUAL DESTABILIZATION ALOFT FROM MS INTO AL WILL SUPPORT
   A CONTINUED THREAT FOR LARGE HAIL WITH THE STRONGEST STORMS...GIVEN
   RELATIVELY STEEP MID LEVEL LAPSE RATES AND EFFECTIVE BULK SHEAR OF
   40-50 KT.  THE CONVECTION WILL BE ROOTED CLOSER TO THE GROUND IN MS
   AND EVENTUALLY INTO WRN AL...WHERE DOWNDRAFTS WITH THE STRONGER
   STORMS MAY PENETRATE THE SURFACE STABLE LAYER AND PRODUCE ISOLATED
   DAMAGING GUSTS.
   
   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 450. MEAN STORM
   MOTION VECTOR 25035.
   
   
   ...THOMPSON
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Page last modified: February 22, 2008
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