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Severe Thunderstorm Watch 37
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WW0037 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 37
   NWS STORM PREDICTION CENTER NORMAN OK
   845 AM CST FRI FEB 27 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF NORTHERN AND CENTRAL ALABAMA
          PARTS OF SOUTHERN ARKANSAS
          PARTS OF NORTHERN LOUISIANA
          PARTS OF NORTHERN AND CENTRAL MISSISSIPPI
   
   EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 845 AM UNTIL 300
   PM CST.
   
   HAIL TO 2.5 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 55
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF EL
   DORADO ARKANSAS TO 45 MILES SOUTH SOUTHEAST OF BIRMINGHAM
   ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY EWD
   ACROSS THE WATCH AREA WHERE STEEP LAPSE RATES AND 40-50KT OF DEEP
   LAYER SHEAR ARE IN PLACE.  SUPERCELLS ARE LIKELY ALONG WITH SHORT
   LINE SEGMENTS/BOWS GIVEN THE ENVIRONMENT.  PRIMARY THREAT WILL BE
   LARGE HAIL AND WIND DAMAGE BUT AS HEATING TAKES PLACE A TORNADO
   THREAT WILL INCREASE DURING THE AFTERNOON AND PORTIONS OF THE WATCH
   AREA MAY NEED TO BE UPGRADED.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 26035.
   
   
   ...HALES
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Page last modified: February 27, 2009
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