Expires:No;;282853
FXUS65 KFGZ 270406
AFDFGZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
906 PM MST THU NOV 26 2009
.SYNOPSIS...HIGH PRESSURE WILL BRING MOSTLY CLEAR SKIES TONIGHT AND 
FRIDAY WITH COLD OVERNIGHT TEMPERATURES. A STRONG LOW PRESSURE SYSTEM WILL 
IMPACT NORTHERN ARIZONA SATURDAY AND SUNDAY WITH COLDER 
TEMPERATURES...BREEZY CONDITIONS...MOUNTAIN SNOW AND VALLEY RAIN.
&&
.DISCUSSION...QUIET WEATHER WILL CONTINUE ACROSS NORTHERN ARIZONA 
THROUGH FRIDAY...HOWEVER A CHANGE IS IN STORE FOR THE WEEKEND. MODELS 
ARE IN GENERAL AGREEMENT THAT A LOW PRESSURE SYSTEM WILL MOVE 
SOUTH-SOUTHEASTWARD ALONG THE CALIFORNIA COAST ON SATURDAY AND WILL 
BE CENTERED OVER BAJA BY SUNDAY AFTERNOON...BEFORE MOVING EASTWARD 
OVER SONORA ON MONDAY. WHILE THERE ARE SOME DIFFERENCES IN THE EXACT 
TRACK OF THEM SYSTEM...UNSETTLED WEATHER CAN BE EXPECTED FROM 
SATURDAY AFTERNOON THROUGH MONDAY. THE GREATEST CHANCES OF 
PRECIPITATION WITH THE SYSTEM WILL BE OVER THE MOGOLLON RIM AND 
WHITE MOUNTAINS FROM LATE SATURDAY AFTERNOON INTO SUNDAY MORNING.
&&
.PREVIOUS DISCUSSION...329 PM...A FEW HIGH CLOUDS ARE SLOWLY 
DRIFTING NORTHWARD FROM SOUTHERN ARIZONA THIS AFTERNOON. 
OTHERWISE...IT WAS CLEAR ACROSS NORTHERN ARIZONA. HIGH PRESSURE OVER 
ARIZONA HAS BEGUN TO WEAKEN AS A TROUGH OF LOW PRESSURE BEGINS TO 
MOVE INTO THE PACIFIC NORTHWEST. THE HIGH WILL CONTINUE TO WEAKEN AS 
THE TROUGH SLIDES DOWN THE WEST COAST. BY FRIDAY AFTERNOON...THE 
TROUGH WILL FORM A CLOSED LOW JUST OFF KSFO COAST. THE LOW IS 
EXPECTED TO MOVE OVER KLAX BY MIDDAY SATURDAY AND OVER THE BAJA SPUR 
BY SUNDAY AFTERNOON. 
THE PACIFIC LOW WILL BRING SIGNIFICANT CHANGES TO THE WEATHER OVER 
NORTHERN ARIZONA SATURDAY AND SUNDAY. SOUTHWEST WINDS AND MOISTURE 
WILL INCREASE OVER NORTHERN ARIZONA ON SATURDAY. THERE WILL BE A 
CHANCE OF SHOWERS OVER THE HIGHER TERRAIN ON SATURDAY MORNING WITH 
THE SNOW LEVEL DROPPING TO AROUND 7000 FEET BY MID DAY. THE MOST 
SIGNIFICANT AMOUNTS OF PRECIPITATION ARE EXPECTED TO OCCUR SATURDAY 
EVENING THROUGH SUNDAY MORNING WHEN THE BEST LIFT AND INSTABILITY 
MOVE ACROSS THE STATE. THE LOW IS FORECAST TO MOVE EAST OVER 
NORTHERN MEXICO SUNDAY NIGHT AND MONDAY. THIS WILL BRING A SLOW 
DECREASE IN PRECIPITATION CHANCES OVER THE NORTHLAND.
BY MONDAY NIGHT...THE LOW IS FORECAST TO MOVE SOUTH AND EAST OF THE 
AREA AND THE CHANCES OF PRECIPITATION WILL CONTINUE TO DECREASE FROM 
NORTHWEST TO SOUTHEAST. HIGH PRESSURE IS FORECAST TO BUILD INTO THE 
SOUTHWEST AND WESTERN STATES BY TUESDAY...HOWEVER NORTHERN ARIZONA 
WILL REMAIN BETWEEN HIGH PRESSURE TO THE WEST AND LOW PRESSURE TO 
THE EAST...SO THAT A NORTHERLY FLOW WILL KEEP HIGH TEMPERATURES ON 
THE COOL SIDE TUESDAY INTO THURSDAY. CONDITIONS DURING THIS TIME 
PERIOD ARE FORECAST TO REMAIN DRY. 
&&
.AVIATION...FOR THE 06Z PACKAGE...EXPECT VFR CONDITIONS FOR THE NEXT 
24 HOURS. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS.
&&
.FGZ WATCHES/WARNINGS/ADVISORIES...NONE. 
&&
$$
PUBLIC.................CLARK/MAS
AVIATION...............CLARK
VISIT WEATHER.GOV/FLAGSTAFF FOR NORTHERN ARIZONA WEATHER 
INFORMATION.