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Severe Thunderstorm Watch 181
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WW0181 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL1
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 181
   NWS STORM PREDICTION CENTER NORMAN OK
   655 PM CDT WED APR 9 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHWEST AND CENTRAL OKLAHOMA
          WESTERN NORTH TEXAS
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 655 PM
   UNTIL 100 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 65
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 140 MILES SOUTHWEST
   OF ALTUS OKLAHOMA TO 35 MILES SOUTH SOUTHEAST OF CHANDLER
   OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
   
   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 178...WW 179...WW 180...
   
   DISCUSSION...ELEVATED THUNDERSTORMS ARE INTENSIFYING NORTH OF
   SURFACE BOUNDARY ACROSS WESTERN NORTH TX AND SOUTHWEST OK.  THESE
   STORMS ARE LIKELY TO INCREASE IN COVERAGE THROUGH THE EVENING AS
   LARGE SCALE FORCING STRENGTHENS.  STEEP MID LEVEL LAPSE RATES AND
   STRONG VERTICAL SHEAR ABOVE STABLE NEAR-SURFACE LAYER WILL PROMOTE
   ELEVATED SUPERCELLS CAPABLE OF LARGE HAIL.
   
   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 24035.
   
   
   ...HART
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