879
FXUS65 KFGZ 210310
AFDFGZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
805 PM MST FRI NOV 20 2009
SYNOPSIS...ASIDE FOR BREEZY SOUTHWEST WINDS ON SATURDAY
NORTHERN
ARIZONA WILL CONTINUE TO SEE MOSTLY CLEAR SKIES...MILD DAYS...AND
COLD NIGHTS THROUGH NEXT WEEK.
DISCUSSION
SKY COVER GRIDS WERE MASSAGED EARLIER TO SHOW MOSTLY CLEAR / MOSTLY
SUNNY THROUGH SATURDAY NIGHT. WE WILL SEE PASSING HIGH CLOUDS FROM
TIME TO TIME ESPECIALLY NORTH OF INTERSTATE 40....BUT THE DURATION
NOR OPAQUENESS ARE GREAT ENOUGH TO MAR A MOSTLY CLEAR FORECAST.
UPDATED TEXT PRODUCTS ALREADY SENT.
PREV DISCUSSION 235 PM... A HIGH PRESSURE RIDGE WAS CENTERED OVER
ARIZONA TODAY WITH A TROUGH MOVING ONTO THE WEST COAST. MOSTLY CLEAR
SKIES AND LIGHT WINDS WERE NOTED OVER NORTHERN AZ WITH INCREASING
HIGH CLOUDS FROM THE APPROACHING TROUGH. MOST OF THE MOISTURE FROM
THE APPROACHING WEATHER SYSTEM WILL BE LOST CROSSING THE SIERRA
NEVADA MOUNTAINS...AND THE MAIN IMPACTS FOR NORTHERN AZ WILL BE A
DECREASE IN TEMPERATURES OVER THE MOUNTAINS AND STRONGER SOUTHWEST
WINDS. VALLEY LOCATIONS ACROSS NORTHEAST AZ WILL ACTUALLY SEE
SLIGHTLY WARMER TEMPERATURES SATURDAY DUE TO MIXING OF INVERSIONS
WITH THE STRONGER WINDS.
SUNDAY THROUGH MUCH OF NEXT WEEK...DRY WEST TO NORTHWEST FLOW ALOFT
IS EXPECTED WITH MILD DAYTIME TEMPERATURES...COLD NIGHTS AND
GENERALLY LIGHT WINDS. A TENDENCY TOWARD NORTHEAST SURFACE WINDS
WILL PREDOMINATE THROUGH MUCH OF THE WORK WEEK DUE TO SURFACE HIGH
PRESSURE BUILDING TO THE NORTH OF AZ
AVIATION...FOR THE 06Z PACKAGE
EXPECT VFR CONDITIONS WITH
PERIODS OF HIGH CLOUDS...ESPECIALLY NORTH OF INTERSTATE 40. BTWN 18Z
SAT -02Z SUN...SOUTHWEST WINDS 10 TO 20 KTS WITH GUSTS TO 30 KTS.
AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS.
FGZ WATCHES/WARNINGS/ADVISORIES
NONE.
PUBLIC.................DL
AVIATION...............DL
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