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WWUS20 KWNS 061101

SEL2

SPC WW 061101

AZZ000-061800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 692

NWS STORM PREDICTION CENTER NORMAN OK

400 AM MST WED OCT 6 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       LARGE PART OF CENTRAL AND NORTHERN ARIZONA



EFFECTIVE THIS WEDNESDAY MORNING FROM 400 AM UNTIL 1100 AM MST.



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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES NORTHEAST OF

GRAND CANYON ARIZONA TO 30 MILES SOUTH SOUTHWEST OF PHOENIX

ARIZONA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



DISCUSSION...ANOTHER ROUND OF STRONG/SEVERE THUNDERSTORMS DEVELOPING

AS VORT LOBE/SW TROUGH ROTATES NEWD ACROSS AZ.  STRONG SHEAR AND

MDTLY MOIST AIR MASS REMAIN IN PLACE ACROSS THE WATCH AREA TO

SUPPORT SEVERE THUNDERSTORMS INCLUDING POSSIBLE SUPERCELLS.  PRIMARY

THREAT WILL BE LARGE HAIL...PARTICULARLY ASSOCIATED WITH ANY

SUPERCELL.



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 450. MEAN STORM

MOTION VECTOR 21040.





...HALES

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