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WWUS20 KWNS 060133

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SPC WW 060133

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 604

NWS STORM PREDICTION CENTER NORMAN OK

630 PM MST TUE JUL 5 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN AND CENTRAL ARIZONA



EFFECTIVE THIS TUESDAY EVENING FROM 630 PM UNTIL 1100 PM MST.



HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHWEST OF

PHOENIX ARIZONA TO 40 MILES SOUTHWEST OF GILA BEND ARIZONA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 600...WW 601...WW

602...WW 603...



DISCUSSION...TSTM CLUSTERS EXPECTED TO CONTINUE MOVING/DEVELOPING

GENERALLY WNWWD INTO DEEPLY MIXED...RELATIVELY MOIST ENVIRONMENT /PW

AOA 1.50 INCHES/ OVER THE LWR DESERTS OF CNTRL/SW AZ.  CURRENT RADAR

ANIMATION SUGGESTS SUFFICIENT COVERAGE OF NEW STORMS ON COMPOSITE

OUTFLOW BOUNDARY HEADING NNW TOWARD THE PHX AREA TO POSE A THREAT

FOR STRONG/POSSIBLY SVR WIND IN THAT AREA BY MID/LATE EVE.

ADDITIONAL MORE ISOLD STORMS WITH HIGH WIND ALSO MAY FORM FARTHER W

TOWARD THE LWR CO RVR VLY...AND ALONG OUTFLOW BOUNDARY MOVING SLOWLY

SW FROM THE RIM COUNTRY.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 13025.





...CORFIDI

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