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Tornado Watch 277
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WW0277 Radar
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   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 277
   NWS STORM PREDICTION CENTER NORMAN OK
   805 AM CDT THU MAY 8 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          NORTHWEST ALABAMA
          NORTHEAST MISSISSIPPI
   
   EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 805 AM UNTIL
   200 PM CDT.
   
   TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
   MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF
   MUSCLE SHOALS ALABAMA TO 55 MILES SOUTHEAST OF GREENWOOD
   MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   DISCUSSION...THUNDERSTORM CLUSTER OVER NE MS IS DEVELOPING SUPERCELL
   CHARACTERISTICS AS THE LOW LEVELS MOISTENING/DESTABILIZE NEWD FROM
   CENTRAL MS INTO NW AL.  ADDITIONAL CONVECTION IS ALSO BEGINNING TO
   DEVELOP ALONG THE WIND SHIFT NEAR THE MS RIVER.  GIVEN THE LOW-LEVEL
   DESTABILIZATION AND EXPECTED PERSISTENCE OF 45-55 KT SWLY LOW-LEVEL
   FLOW AND RELATIVELY STRONG LOW-LEVEL SHEAR IN ADVANCE OF THE MID
   LEVEL TROUGH IN AR...THE THREAT FOR SUPERCELLS AND A COUPLE OF
   TORNADOES WILL LIKELY CONTINUE THROUGH AT LEAST MIDDAY. 
   OTHERWISE...DAMAGING WINDS AND LARGE HAIL CAN BE EXPECTED WITH THE
   STRONGER STORMS.
   
   AVIATION...TORNADOES AND 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 25035.
   
   
   ...THOMPSON
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Page last modified: May 08, 2008
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