National Weather Service Tucson Arizona
AREA FORECAST DISCUSSION
FXUS65 KTWC 200855 AFDTWC AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 155 AM MST SAT SEP 20 2008 .SYNOPSIS... DRY CONDITIONS WITH ABOVE NORMAL DAYTIME TEMPERATURES INTO NEXT WEEK AS HIGH PRESSURE ALOFT DIVERTS STORM SYSTEMS WELL NORTH OF THE AREA. && .DISCUSSION...UPPER LOW OVER NRN CALIFORNIA EARLY THIS MORNING WILL MOVE NEWD TODAY AS HIGH PRESSURE ALOFT REMAINS OVER SE AZ. 20/00Z NAM HINTED AT THE POTENTIAL FOR A SHOWER ACROSS EXTREME COCHISE COUNTY LATE THIS AFTERNOON...WHILE THE 20/00Z ECMWF PRODUCED LIGHT PRECIP ACROSS THE WHITE MOUNTAINS. HOWEVER BELIEVE AIRMASS WILL BE TOO DRY AND STABLE TO SUPPORT ANY SHOWERS/TSTMS CAPABLE OF PRODUCING MEASURABLE PRECIP. FAIRLY DRY WLY FLOW ALOFT TO OCCUR SUN-MON. LARGE UPPER HIGH TO BE OVER THE SWRN CONUS DURING THE TUE-FRI PERIOD WITH STORM TRACK DIVERTED WELL NORTH OF SE AZ. THUS EXPECT PRECIP-FREE CONDITIONS WITH ABOVE NORMAL DAYTIME TEMPS DURING THE UPCOMING WEEK. && .AVIATION...MOSTLY CLEAR SKIES ACROSS MUCH OF SE AZ INTO SUNDAY WITH PARTLY CLOUDY SKIES ACROSS THE WHITE MOUNTAINS. LIGHT SURFACE WINDS INTO SUNDAY. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE.
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