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Severe Thunderstorm Watch 285
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WW0285 Radar
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   SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 285
   NWS STORM PREDICTION CENTER NORMAN OK
   125 AM CDT FRI MAY 9 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF NORTHWEST ARKANSAS
          SMALL PART OF SOUTHEAST KANSAS
          PARTS OF SOUTHERN MISSOURI
          PARTS OF NORTHEAST OKLAHOMA
   
   EFFECTIVE THIS FRIDAY MORNING FROM 125 AM UNTIL 500 AM CDT.
   
   HAIL TO 2 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 WEST
   NORTHWEST OF GROVE OKLAHOMA TO 35 MILES NORTHEAST OF HARRISON
   ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
   
   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 283...WW 284...
   
   DISCUSSION...CLUSTER OF SEVERE TSTMS VICINITY SERN KS/OK BORDER IS
   DRIVEN BY UPPER  S/WV TROUGH AND ASSOCIATED WIND MAX.  ALTHOUGH
   INSTABILITY APPEARS MARGINAL...STEEP MID LEVEL LAPSE RATES AND
   STRONG VEERING SHEAR PROFILES WILL SUPPORT ORGANIZED STORMS
   INCLUDING SUPERCELL STRUCTURES ACROSS THE WATCH AREA.
   
   AVIATION...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 27035.
   
   
   ...HALES
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Page last modified: May 09, 2008
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