Area Forecast Discussion
Issued by NWS Fairbanks, AK

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FXAK69 PAFG 251342
AFDAFG

NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
442 AM AKST THU DEC 25 2014

.DISCUSSION...
THE COMBINATION OF A BROAD UPPER LEVEL LOW EXTENDING FROM THE
ARCTIC TO THE EASTERN BERING SEA AND FLAT RIDGE ALOFT OVER THE
NORTH PACIFIC CONTINUES TO RESULT IN SOUTHWEST FLOW ALOFT ACROSS
THE STATE. WEAK SHORT WAVES EMBEDDED IN THE SOUTHWEST FLOW WILL
PROGRESS ACROSS THE INTERIOR THROUGH FRIDAY NIGHT AND BRING BOUTS
OF SNOWFALL TO MUCH OF THE FORECAST AREA. ALL MODELS ARE IN
AGREEMENT WITH A MAJOR PATTERN CHANGE OVER THE WEEKEND AS A STRONG
LOW MOVES INTO THE WESTERN BERING SEA NEAR KAMCHATKA. A VERY HIGH
AMPLITUDE RIDGE DEVELOPS TO THE EAST OF THIS LOW AND WILL CAUSE
STRONG SOUTHERLY FLOW ACROSS MAINLAND ALASKA INTO NEXT WEEK. THIS
WILL BRING TEMPERATURES WELL ABOVE NORMAL...CHINOOK WINDS THROUGH
THE ALASKA RANGE...AND A CHANCE FOR MIXED PRECIPITATION OVER THE
SOUTHERN PORTIONS OF THE FORECAST AREA EARLY NEXT WEEK.

A TROUGH LIFTING NORTH ACROSS THE WESTERN AND CENTRAL INTERIOR HAS
RESULTED IN SNOW THIS MORNING FROM THE LOWER YUKON VALLEY NORTH
TO THE BROOKS RANGE...AND WILL SPREAD TO THE ARCTIC COAST TODAY.
A SECOND TROUGH FOLLOWING ROUGHLY THE SAME TRACK TONIGHT WILL
BRING ADDITIONAL SNOWFALL TO THIS REGION BUT WILL ALSO SPREAD
FURTHER EAST TO THE ALCAN BORDER AS WEAK SOUTH FLOW OVER THE
ALASKA RANGE ENDS. SNOWFALL TOTALS FROM 3 TO 6 INCHES THROUGH
FRIDAY MORNING ARE EXPECTED FROM THE GALENA AREA NORTHWARD TO THE
BROOKS RANGE AND ADVISORIES HAVE BEEN ISSUED. FURTHER EAST
SNOWFALL AMOUNTS WILL BE IN THE 1 TO 2 INCH RANGE THROUGH FRIDAY.
SNOW WILL DIMINISH FROM WEST TO EAST ON FRIDAY. THE WEST COAST
WILL REMAIN RELATIVELY DRY OVER THE NEXT 48 HRS.

COASTAL HAZARD POTENTIAL DAYS 3 AND 4...NONE

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY FOR AKZ216-AKZ217-AKZ219.

HEAVY FREEZING SPRAY WARNING FOR PKZ210.

SMALL CRAFT ADVISORY FOR PKZ210.

BRISK WIND ADVISORY FOR PKZ220-PKZ225.
&&

$$

EWP DEC 14



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