FXAK69 PAFG 280018
AFDAFG

NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
318 PM AKST FRI NOV 27 2009

.DISCUSSION...ACTIVE PATTERN TO CONTINUE FOR THE FORESEEABLE
FUTURE. A DYING LOW PRESSURE SYSTEM IN THE NORTHERN GULF OF ALASKA
WILL CONTINUE TO MOVE NORTH THROUGH THE NIGHT. THE GRADIENT WILL
REMAIN RATHER TIGHT THROUGH THE NIGHT FOR EASTERN PORTIONS OF THE
ALASKA RANGE...SO HAVE EXTENDED THE WIND ADVISORY FOR EASTERN
PASSES INTO SAT MORNING. 

AS THE LOW PRESSURE SYSTEM MOVES NORTH TONIGHT...IT WILL DRAG SOME
AREAS OF SNOW WITH IT. SOUTHERLY FLOW WILL ENHANCE SNOWFALL TOTALS
ALONG THE SOUTHERN BROOKS RANGE. SNOWFALL TOTALS OF 3 TO 6 INCHES
ARE EXPECTED IN SOME AREAS OF ZONES 218 AND 219. SUB ADVISORY
SNOWFALL EXPECTED IN EASTERN 215 216 AND 217 AS WELL AS IN ZONES
227 AND 221. 

TEMPERATURES WILL BE GRADUALLY COOLING OVERNIGHT AS THE CHINOOK
FLOW WEAKENS...BUT THERE ARE STILL A FEW GUSTY SPOTS THAT WILL
REMAIN WARM OVER THE SOUTHEASTERN INTERIOR. SOME LEGITIMATELY
COLD SIBERIAN AIR WILL BE SWINGING INTO THE WEST COAST OVERNIGHT
WITH SOME 850 MB TEMPERATURES BELOW -20C. THERE IS QUITE A BIT OF
LOW STRATUS FOG AND FLURRIES MOVING ALONG WITH THIS COLDER AIR
MASS...SO TEMPERATURE FORECASTS WILL BE A CHALLENGE.

THE NEXT STORM SYSTEM IS EXPECTED TO MOVE INTO THE SOUTHERN GULF
OF ALASKA TONIGHT AND THEN ASHORE NEAR YAKUTAT...BRINGING A CHANCE
OF SOME LIGHT SNOW OVER THE INTERIOR ON SUNDAY. CAA MOVING IN FROM
THE WEST SHOULD GIVE THE MOISTURE A NICE COLD POOL TO FALL INTO.
EXPECT 1 TO 3 INCHES FOR AREAS EAST OF BETTLES AND SOUTH OF THE
BROOKS RANGE ON SUNDAY.

A STRONG LOW PRESSURE SYSTEM WITH SOME GOOD UPPER LEVEL SUPPORT
WILL MOVE INTO THE SOUTHERN BERING SEA ON SUNDAY MORNING AND WILL
LIKELY BRING BLIZZARD CONDITIONS TO MUCH OF THE WEST COAST BY
MONDAY...AS WELL AS A HEFTY CHINOOK TO THE INTERIOR WITH 700 MB
WINDS IN EXCESS OF 80KT THROUGH THE ALASKA RANGE LATE MONDAY/EARLY
TUESDAY MORNING. WARM TEMPERATURES...SLICK ROADS...AND HIGH WIND
WARNINGS ARE LIKELY.

COASTAL HAZARD POTENTIAL DAYS 3 AND 4...STRONG NORTHERLY WINDS ON
MONDAY COULD WHIP UP SEAS IN THE REMAINING OPEN WATERS NEAR ST
LAWRENCE ISLAND...WHICH COULD BRING HIGH SURF TO GAMBELL AND 
SAVOONGA IF THE STORM TRACKS AS PREDICTED BY CURRENT MODEL RUNS.

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY FOR AKZ226.

WINTER WEATHER ADVISORY FOR AKZ218-AKZ219.

HEAVY FREEZING SPRAY WARNING FOR PKZ210.

SMALL CRAFT ADVISORY FOR PKZ210.
&&

$$

KA NOV 09