Snow Advisory 5, NWS Fairbanks, AK

NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
503 AM AST WED JAN 17 2007

.DISCUSSION..
A PROGRESSIVE SOUTH TO SOUTHWEST UPPER LEVEL FLOW PATTERN WILL
PERSIST OVER THE CENTRAL AND EASTERN PARTS OF THE FORECAST AREA
FOR THE NEXT WEEK AS A SERIES OF LOW AMPLITUDE TROUGHS AND RIDGES
MOVE THROUGH. A MEAN UPPER TROUGH POSITION WILL BE MAINTAINED
OVER THE BERING SEA TROUGH EARLY NEXT WEEK. THIS WILL RESULT IN
MOSTLY CLOUDY SKIES PERSISTING OVER THE FORECAST AREA.

AT THE SURFACE...A WAVE IS NOW APPROACHING PRINCE WILLIAM
SOUND AND NORTH GULF COAST...WITH THE PREFRONTAL CLOUD SHIELD
EXTENDING WELL INTO THE INTERIOR. AN WEATHER FRONT EXTENDS FROM
A,LOW OVER THE CENTRAL ALEUTIANS TO KUSKOKWIM BAY AND THEN
EASTWARD TO COOK INLET. WIDESPREAD SNOW IS LIKELY OVER
THE WESTERN INTERIOR AND WEST COAST AS THE FRONT MOVES
NORTHWARD...WITH MOIST MILDER AIR OVERRUNNING ARCTIC AIR
TO THE NORTH.

THE NEXT WAVE IN THE SERIES IS EXPECTED TO REACH THE
EASTERN NORTH GULF COAST THURSDAY AFTERNOON...THEN WEAKEN
RAPIDLY AS IT MOVES NORTHWARD INTO THE INTERIOR. ANOTHER
WAVE IS EXPECTED TO MOVE ONSHORE ALONG THE EASTERN NORTH GULF
COAST SATURDAY EVENING.

THROUGH DAY 3...MODELS RUNS APPEAR TO BE IN BASIC AGREEMENT ON
THE LARGE SCALE SCENARIO...BUT THERE ARE SOME DIFFERENCES IN THE
DETAILS.

COASTAL HAZARD POTENTIAL DAYS 3 AND 4...NONE

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
BRISK WIND ADVISORY FOR PKZ200-PKZ210.
&&

RF JAN 07