634
FXUS65 KTWC 210332
AFDTWC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
832 PM MST FRI NOV 20 2009
SYNOPSIS
WEATHER SYSTEMS WILL CONTINUE TO PASS NORTH OF OUR AREA.
OTHER THAN SOME OCCASIONAL PATCHES OF HIGH CLOUDS...SOUTHEAST
ARIZONA WILL REMAIN DRY WITH MOSTLY CLEAR SKIES AND WARM DAYTIME
TEMPERATURES.
DISCUSSION
IT WAS ANOTHER MILD DAY ACROSS SOUTHEAST ARIZONA TODAY
WITH HIGH TEMPERATURES ABOUT 4 TO 7 DEGREES ABOVE NORMAL FOR THIS
TIME OF YEAR. THE CURRENT PATTERN FEATURES A RIDGE AXIS LOCATED
ACROSS SOUTHEAST ARIZONA AND A LONGWAVE TROUGH MOVING INLAND FROM
THE PACIFIC NORTHWEST INTO THE SIERRA NEVADA RANGE. THIS TROUGH WILL
PUSH EAST INTO THE GREAT BASIN SATURDAY WITH DRY WESTERLY FLOW
ACROSS SOUTHEAST ARIZONA AND THE CONTINUATION OF ABOVE NORMAL
TEMPERATURES. THE SHORT TERM FORECAST IS IN EXCELLENT SHAPE WITH
JUST A FEW CIRRUS CLOUDS MOVING THROUGH OVERNIGHT. NO UPDATES ARE
PLANNED.
AVIATION
SOME WISPS OF CIRRUS NEXT 24 HOURS OTHERWISE IT WILL BE
CLEAR. EXPECT NORMAL DIURNAL WIND TRENDS AT THE TERMINAL SITES.
AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS.
FIRE WEATHER
A PACIFIC WEATHER SYSTEM WILL MOVE NORTH OF THE AREA
ON SATURDAY. DRY CONDITIONS WILL CONTINUE ACROSS SOUTHEAST ARIZONA
ALTHOUGH SOME WEST AND SOUTHWEST BREEZES MAY OCCUR...PARTICULARLY
ACROSS THE HIGHER TERRAIN NORTH AND EAST OF TUCSON SATURDAY
AFTERNOON. DRY CONDITIONS WILL CONTINUE SUNDAY INTO MONDAY UNDER
NORTHWESTERLY FLOW ALOFT.
CLIMATE...COUNTING TODAY'S HIGH/LOW TEMPERATURE DATA
THE AVERAGE
TEMPERATURE FOR NOVEMBER AT THE TUCSON AIRPORT IS 66.8 DEGREES. THIS
CURRENTLY RANKS AS THE 4TH WARMEST TO DATE...WELL BEHIND THE RECORD
OF 69.6 DEGREES FROM 1999.
TWC WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/TUCSON
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