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Severe Thunderstorm Watch 159
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WW0159 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 159
   NWS STORM PREDICTION CENTER NORMAN OK
   1025 PM CDT THU APR 3 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHEAST ARKANSAS
          MISSOURI BOOTHEEL
          NORTHWEST MISSISSIPPI
          WESTERN TENNESSEE
   
   EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1025 PM
   UNTIL 500 AM CDT.
   
   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 80
   STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF
   DYERSBURG TENNESSEE TO 45 MILES SOUTH SOUTHEAST OF MEMPHIS
   TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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 157...WW 158...
   
   DISCUSSION...LARGE MCC NOW OVERSPREADING AR WILL CONTINUE ENEWD
   ACROSS THE MID SOUTH WITHIN STRENGTHENING LOW LEVEL WAA REGIME. 
   STEEP MID LEVEL LAPSE RATES AND MODEST MUCAPE WILL SUSTAIN A FEW
   STRONGER CELLS...WITH VERY STRONG SHEAR SUPPORTIVE OF LONGER-LIVED
   SUPERCELLS/LINES.  LARGE HAIL AND ISOLATED DAMAGING WINDS ARE
   EXPECTED TO BE PRIMARY SEVERE THREATS AS STORMS SHOULD BE SLIGHTLY
   ELEVATED.  HOWEVER...TORNADO THREAT WILL NEED CLOSE SCRUTINY GIVEN
   VERY STRONG LOW LEVEL SHEAR.
   
   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 25035.
   
   
   ...EVANS
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