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Tornado Watch 221
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WW0221 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
   TORNADO WATCH NUMBER 221
   NWS STORM PREDICTION CENTER NORMAN OK
   325 PM CDT WED APR 23 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          PARTS OF NORTHWEST AND WEST CENTRAL TEXAS
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 325 PM UNTIL
   1100 PM CDT.
   
   TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF MIDLAND
   TEXAS TO 5 MILES NORTH NORTHEAST OF STEPHENVILLE TEXAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU1).
   
   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.
   
   OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
   WATCH NUMBER 219. WATCH NUMBER 219 WILL NOT BE IN EFFECT AFTER
   325 PM CDT. CONTINUE...WW 217...WW 218...WW 220...
   
   DISCUSSION...TORNADIC SUPERCELLS HAVE DEVELOPED ALONG E/W BOUNDARY
   CENTRAL TX AS S/WV TROUGH AND MID LEVEL WIND MAX MOVE ACROSS AREA. 
   WITH A VERY UNSTABLE AIR MASS IN PLACE AND FAVORABLE VEERING SHEAR
   PROFILES...TORNADIC SUPERCELLS WILL CONTINUE EWD VICINITY OF
   BOUNDARY AS WELL AS ACROSS WARM SECTOR OF WATCH AREA.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 25030.
   
   
   ...HALES
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