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   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 670
   NWS STORM PREDICTION CENTER NORMAN OK
   230 PM MDT TUE JUL 27 2004
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL AND SOUTHEAST ARIZONA
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL 800
   PM MDT.
   
   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 ALONG AND 60 STATUTE MILES
   NORTH AND SOUTH OF A LINE FROM 50 MILES WEST OF PRESCOTT ARIZONA
   TO 35 MILES EAST OF SAFFORD ARIZONA.
   
   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 669...
   
   DISCUSSION...THUNDERSTORMS ARE DEVELOPING OVER HIGHER TERRAIN. WITH
   UPPER TROUGH AND STRONGER FLOW MOVING ACROSS NRN AZ...SHEAR PROFILES
    WILL SUPPORT POTENTIAL FOR ISOLATED SUPERCELLS AS STORMS DEVELOP
   TOWARD LOWER ELEVATIONS.  THIS WILL ENHANCE LARGE HAIL AND DAMAGING
   WIND THREAT.
   
   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 550. MEAN STORM
   MOTION VECTOR 29020.
   
   
   ...HALES