Brisk Wind Advisory 40, NWS Fairbanks, AK

NORTH ALASKA FORECAST DISCUSSION
230 PM AST SAT FEB 5 2005

.DISCUSSION...

.ALOFT...RIDGE EXTENDING NORTH OVER GULF OF ALASKA TO THE NORTH
SLOPE WILL MOVE EAST INTO CANADA SUN AS LOW OVER WRANGEL ISLAND
MOVES SOUTHEAST TO OVER CAPE LISBURNE BY SUN NIGHT. FLOW BETWEEN
THE RIDGE AND LOW WILL BECOME INCREASINGLY SOUTHWEST OVER THE
INTERIOR SUN. THE LOW WILL MOVE SOUTH TO THE BERING STRAIT MON
AFTERNOON WITH UPPER LEVEL FLOW COMING DIRECTLY OVER THE ALASKA
RANGE. THE SOUTHERLY FLOW OVER THE RANGE WILL CONTINUE THROUGH WED
AS THE LOW SLOWLY DRIFTS TO OVER THE YUKON DELTA BY THAT TIME.

.SURFACE...AN OCCLUDED FRONT ASSOCIATED WITH STRONG LOW PRESSURE
OVER THE CENTRAL ALEUTIANS WILL MOVE NORTH TO SOUTHWESTERN ALASKA
TONIGHT THEN TO THE WESTERN INTERIOR SUN. LOW PRESSURE WILL FORM
OVER THE SOUTHWESTERN INTERIOR MON THEN DISSIPATE MON NIGHT AS A
STRONGER LOW MOVES NORTH OF KODIAK. THE LOW WILL WEAKEN OVER THE
INTERIOR TUE NIGHT.

.NORTH SLOPE...LIGHT WINDS WILL BECOME EAST TO 20 KNOTS SUN AS
GRADIENT BETWEEN ARCTIC HIGH AND DEEPENING LOW PRESSURE OVER THE
INTERIOR STRENGTHENS. WARMER AIR WILL BE PULLED NORTH OVER THE
AREA MON AS LOW PRESSURE OVER WEST COAST FORMS. LIGHT SNOW OR
FLURRIES WILL SETTLE OVER THE AREA SUN NIGHT AND MON THEN CONTINUE
THROUGH MID WEEK. EAST TO NORTHEAST WINDS COMBINED WITH THE SNOW
WILL REDUCE VISIBILITIES AT TIMES.

.WEST COAST...BRISK TO GALE NORTH WINDS WILL DEVELOP OVER THE
SAINT LAWRENCE ISLAND AND BERING STRAIT MARINE AREAS ON SUN AS LOW
MOVES NORTH OF THE CENTRAL ALEUTIANS AND OCCLUDED FRONT MOVES
NORTH TO SOUTHWEST ALASKA. WINDS WILL CONTINUE AT BRISK TO GALE
THROUGH MON BUT BECOME MORE NORTHERLY AS LOW PRESSURE FORMS OVER
THE WESTERN INTERIOR. COLD AIR WILL WRAP AROUND LOW PRESSURE OVER
THE WEST COAST AND REINFORCE COLD TEMPERATURES OVER SAINT LAWRENCE
ISLAND AND THE BERING STRAIT MON THROUGH WED. WIND CHILLS OF 50
BELOW COULD BECOME A FACTOR IN THE WIND AND COLD. ON TUE AND WED
THE COLDER AIR WILL REACH SOUTHWEST ALASKA. SNOWFALL WITH THE
SYSTEM WILL BE MAINLY EAST AND SOUTH OF SAINT LAWRENCE ISLAND.

.INTERIOR...WARMER TEMPERATURES ARE ON THE WAY FOR THE INTERIOR
SUN THROUGH MON AS SOUTHERLY FLOW BETWEEN LOW PRESSURE TO THE WEST
AND RIDGE TO THE EAST INCREASES. SOUTHWEST FLOW SUN AND MON WILL
BRING A CHANCE OF SOME SNOW FOR THE CENTRAL TO EASTERN INTERIOR
BUT THIS CHANCE WILL QUICKLY END MON NIGHT AS THE FLOW COMES
DIRECTLY OVER THE ALASKA RANGE. THIS WILL LEAVE THE WESTERN
INTERIOR AND SOUTH SLOPES OF THE BROOKS RANGE WITH THE MOST
ACCUMULATIONS OVER THE NEXT FEW DAYS. COLDER AIR WRAPPING AROUND
THE WEST COAST LOW PRESSURE COULD ENTER THE PICTURE FROM THE SOUTH
BY THU.

.AFG WATCH/WARNING/ADVISORIES...
PUBLIC...WIND CHILL ADVISORY:
            ZONE 209 KOTZEBUE SOUND
            ZONE 213 SAINT LAWRENCE ISLAND
            ZONE 223 DELTANA AND TANANA FLATS
MARINE...GALE WARNING:
            AREA 9B DALL POINT TO WALES
            AREA 10B WALES TO CAPE LISBURNE

DA FEB 05