102 
FXUS65 KFGZ 101642
AFDFLG
 
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
930 AM MST FRI DEC 10 1999

SYNOPSIS...A LOW PRESSURE SYSTEM MOVING INTO SOUTHWESTERN ARIZONA
THIS AFTERNOON WILL STRENGTHEN SLIGHTLY AND MOVE EAST OVERNIGHT.
LIMITED MOISTURE AND COLDER AIR ASSOCIATED WITH THIS SYSTEM WILL
DEVELOP AREAS OF LIGHT SNOW ALONG THE NORTHERN BORDER AND LATER
TODAY OVER HIGHER TERRAIN. SNOW SHOWERS WITH RAIN BELOW 5000 FEET
WILL CONTINUE THROUGH EARLY SATURDAY MORNING. ACCUMULATIONS FROM
THIS STORM ARE EXPECTED TO BE LIGHT. FAIR AND DRY WEATHER WILL
RETURN SUNDAY AND MONDAY.
 
DISCUSSION...MOST SNOWFALL AT THIS TIME IS OCCURRING IN UTAH. THIS
OCCURRING WHILE UPPER LOW DIVES SOUTH TOWARDS YUMA AND PREPARING TO
CUT-OFF LATER TODAY. MOISTURE IS VERY LIMITED ON SATELLITE AND MOST
OBS OUTSIDE OF UTAH SHOWING A DRY AIRMASS. STILL...DYNAMICS WILL
CONTINUE THROUGH MOST OF THE DAY AND MOVE SOUTH AND EAST OVERNIGHT.
THIS PROBABLY ENOUGH TO DEVELOP SNOW SHOWERS BY THE AFTERNOON IN
UPSLOPE FAVORED AREAS...ON AND OFF SNOW WILL CONTINUE ALONG THE
NORTHERN BORDER AS WELL. PROBLEM BY TONIGHT WILL BE THE DEVELOPMENT
OF NORTHEAST WINDS AND POSSIBLE WRAP-AROUND SNOWFALL OVER THE RIM
AND IN THE EAST. 12Z NGM MOST FAVORABLE FOR THIS WHILE AVN/ETA MORE
PROGRESSIVE...DRIER...AND FARTHER SOUTH. WILL EXAMINE THIS FOR THE
AFTERNOON PACKAGE. THE BOTTOM LINE WILL BE...NO HI-LITES WILL BE
NECESSARY...IN FACT...WILL BE UPDATING MORNING ZONES TO BACK DOWN
EVEN FURTHER ON SNOWFALL AMOUNTS AND POPS TODAY. PETERSON

.FGZ...NONE.