FXUS65 KFGZ 262249
AFDFGZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
349 PM MST SAT DEC 26 2009

.SYNOPSIS...A COLD AIRMASS BEHIND THE LARGE LOW PRESSURE SYSTEM OVER 
THE CENTRAL PART OF THE COUNTRY WILL CONTINUE TO BRING BELOW NORMAL 
TEMPERATURES TO NORTHERN ARIZONA THROUGH THE WEEKEND. A SERIES OF 
WEATHER DISTURBANCES ARE FORECAST TO MOVE ACROSS THE SOUTHWEST 
STATES LATE MONDAY THROUGH WEDNESDAY...BRINGING UNSETTLED WEATHER TO 
NORTHERN ARIZONA.

&&

.DISCUSSION...A WEAK SHORTWAVE RIDGE WILL DEVELOP ACROSS THE 
NORTHLAND THROUGH SUNDAY WITH RATHER COLD AND DRY CONDITIONS 
CONTINUING. PERIODS OF MID-TO-UPPER LEVEL CLOUDINESS CAN BE EXPECTED 
TO INCREASE OVER THE NEXT 24HRS. A SERIES OF DISTURBANCES ACROSS THE 
WESTERN UNITED STATES WILL PRODUCE UNSETTLED WEATHER FROM BEGINNING 
MONDAY AFTERNOON AND CONTINUING THRU MIDWEEK. THE 
TIMING...POSITION...AND AMPLITUDE OF THESE FEATURES ARE FAR FROM 
CERTAIN RIGHT NOW...BUT FEEL A DECENT CHANCE OF VALLEY RAIN AND 
MOUNTAIN SNOW SHOWERS IS IN STORE. HAVE INCREASED PRECIP CHANCES 
WITH THE AFTERNOON PACKAGE...MAINLY NEAR THE WHITE MOUNTAINS.

THURSDAY INTO THE WEEKEND...GENERALLY DRIER AND SLIGHTLY WARMER 
DAYTIME WEATHER IS EXPECTED DURING A TRANSITION INTO HIGH PRESSURE. 

&&

.AVIATION...FOR THE 00Z PACKAGE...EXPECT VFR CONDITIONS WITH LIGHT 
WINDS THROUGH THE PERIOD. MIDDLE AND HIGH CLOUDS WILL INCREASE FROM 
THE WEST THROUGH THE NIGHT...DECREASING FROM THE WEST SUNDAY 
AFTERNOON. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS.

&&

.FGZ WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

PUBLIC.........KD
AVIATION.......PETERSON

VISIT WEATHER.GOV/FLAGSTAFF FOR NORTHERN ARIZONA WEATHER 
INFORMATION.