WATCHES: Severe Thunderstorm Watch Number 896

WWUS20 KWNS 101843
SEL6
SPC WW 101843
AZZ000-110200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 896
NWS STORM PREDICTION CENTER NORMAN OK
1145 AM MST WED SEP 10 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

LARGE PART OF WESTERN ARIZONA

EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1145 AM UNTIL
700 PM 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 85
STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES NORTHWEST OF
FLAGSTAFF ARIZONA TO 55 MILES SOUTHWEST OF GILA BEND ARIZONA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

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...LOW LEVEL MOISTURE CONTINUES TO FEED NEWD INTO AZ AHEAD
OF CA UPPER TROUGH. WITH 30-35 KT OF DEEP LAYER SHEAR AND MLCAPES
AOA 1500 J/KG THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY
ACROSS WRN AZ. SHEAR IS SUFFICIENT FOR DEVELOPMENT OF SUPERCELLS
WHICH WILL ENHANCE PRIMARILY HAIL AND DAMAGING WIND POTENTIAL.

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 23020.

...HALES

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