Brisk Wind Advisory 200, NWS Fairbanks, AK

NORTHERN ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FAIRBANKS AK
114 PM AKST THU DEC 22 2011

.DISCUSSION...
974 MB ELONGATED LOW 100 NM SOUTH OF CORDOVA CONTINUES TO MOVE
NORTHWARD THIS AFTERNOON AND WILL MAKE LAND FALL NEAR CORDOVA THIS
EVENING. MOISTURE AHEAD OF THIS SYSTEM CONTINUES TO STREAM NORTH
AND NORTHWEST INTO THE SOUTHEASTERN INTERIOR. SNOW HAS STARTED IN
PAOR AND IN ZONE 226. WINTER WEATHER ADVISORIES WILL GO OUT WITH
THE AFTERNOON PACKAGE FOR ZONES...223...224...225 AND 226.

THE 974 MB LOW NEAR CORDOVA THIS EVENING WEAKENS DRAMATICALLY IN
THE LOW LEVELS OVER NIGHT AS IT MOVES INLAND OVER THE MOUNTAINS.
A 991 MB SURFACE LOW EMERGES OVER THE SOUTHERN YUKON. UPSLOPE FLOW
FROM SURFACE THROUGH 850 MB COMBINED WITH MOISTURE AND FAVORABLE
DENTRITIC GROWTH TEMPERATURES WILL KEEP SNOW IN THE SOUTHEASTERN
INTERIOR THROUGH FRIDAY EVENING. SNOWS DIMINISH IN THE EVENING AS
REMNANTS CONTINUE TO WEAKEN AND MOVE NORTHEAST.

MEANWHILE THE COLD AIR MASS CONTINUES TO MOVE SOUTHWARD INTO
NORTHERN ALASKA THROUGH THE DAY FRIDAY FOR THE NORTH SLOPE AND
CONTINUES MOVING SOUTHEAST INTO THE WEST COAST AND WESTERN
INTERIOR FRIDAY NIGHT AND SATURDAY. TEMPERATURES MAY DROP SIGNIFICANTLY
SATURDAY NIGHT ACROSS THE CENTRAL INTERIOR WHERE SKIES SCATTER OUT
BEHIND THE REMNANTS OF THE LOW MOVING NORTHEAST OUT OF THE YUKON.
CLOUD COVER OVER THE SOUTHEASTERN INTERIOR SHOULD PREVENT
TEMPERATURES FROM TANKING.

LONG RANGE MODELS REMAIN IN DECENT AGREEMENT ON LARGE SCALE
FEATURES. EXACT POSITIONS ON SHORTWAVE FEATURES AND ATTENDING
CLOUD COVER WILL HAVE LARGE IMPACTS ON TEMPERATURES THROUGH THE
PERIOD. THIS WILL BE PARTICULARLY TRUE IN THE EASTERN AND CENTRAL
INTERIOR WHERE SHORTWAVES RIDING OVER THE LONG WAVE RIDGE TO OUR EAST
WILL PRODUCE PERIODS OF CLOUDS. THE BELOW NORMAL TEMPERATURES LOOK
TO REMAIN ENTRENCHED ACROSS NORTHERN ALASKA THROUGH THE WEEK.

COASTAL HAZARD POTENTIAL DAYS 3 AND 4...NONE

&&

.AFG WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY FOR AKZ223-AKZ224-AKZ225-AKZ226.

BRISK WIND ADVISORY FOR PKZ210-PKZ220-PKZ225.
&&

CC DEC 11