Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 120009
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
300 PM AKST MONDAY 11 DECEMBER 2017

FORECAST VALID THROUGH...SATURDAY 13 DECEMBER 2017

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...LOW PRESSURE WILL GENERALLY REMAIN OVER THE SOUTHWEST
MAINLAND/EASTERN BERING THROUGH THE BERING STRAIT WHILE HIGH
PRESSURE REMAINS OVER THE WESTERN HIGH ARCTIC THROUGH SATURDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-

PKZ215-KOTZEBUE SOUND-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-

ICE COVERED.

-CHUKCHI SEA-
PKZ220-WALES TO CAPE THOMPSON-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE CHUKCHI SEA EXTENDS FROM NEAR WALES TO
66.7N 165.5W TO 68.9N 170.8W TO 70.1N 170.5W TO 71.5N 167.6W TO
72.1N 173.5W TO 70.1N 175.3W TO 68.8N 171.5W AND CONTINUES SOUTH
TO THE RUSSIAN COAST NEAR 66.3N 170.3W. THE ICE EDGE IS MAINLY OPEN
WATER.
THERE IS ALSO NEW AREAS OF BRASH ICE FORMING WITHIN THE ICE FREE
AREA LEFT IN THE CHUKCHI...AWAY FROM THE PACK.

FORECAST THROUGH SATURDAY FOR THE CHUKCHI SEA...STRONG NORTHEAST
WINDS WILL PERSIST THROUGH SATURDAY. THE MAIN ICE EDGE IS EXPECTED
TO ADVANCE 40 TO 60 NM SOUTHWESTWARD THROUGH SATURDAY.
WHILE SEA SURFACE TEMPERATURES ARE GETTING MORE CONDUCIVE FOR ICE
GROWTH...STRONG WINDS WILL LIKELY KEEP MUCH NEW ICE FROM FORMING.

-BERING SEA-PKZ160-BRISTOL BAY-PKZ180-KUSKOKWIM DELTA AND ETOLIN
STRAIT-PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-

THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM NEAR QUINHAGAK TO
59.4N 164.3W TO 60.9N 166.9W TO 63.3N 166.1W TO NEAR WALES. THERE IS
ALSO NEW AND YOUNG SEA ICE IN BRISTOL BAY...ESPECIALLY KVICHAK BAY.
NEW ICE HAS ALSO BEEN OBSERVED ON THE SOUTH SIDE OF SAINT LAWRENCE
ISLAND. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH SATURDAY FOR THE BERING SEA...MODERATE
NORTHERLY WINDS WILL PERSIST THROUGH TUESDAY BEFORE LOW PRESSURE SETS
UP OVER MUCH OF THE PACK LEADING TO VARIABLE WINDS. THE ICE EDGE
ALONG THE WEST COAST OF ALASKA IS EXPECTED TO MOVE 10 TO 20 NM TO
THE SOUTHWEST THROUGH SATURDAY.

-COOK INLET-
PKZ130-WEST OF BARREN ISLANDS INCLUDING KAMISHAK BAY-
PKZ139-COOK INLET KALGIN ISLAND TO PT. BEDE-
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-

ANALYSIS CONFIDENCE...MODERATE

NEW AND YOUNG SEA ICE HAS BEEN OBSERVED NORTH OF A LINE FROM NEAR
TYONEK TO 61.2N 150.7W TO 61.1N 150.6W TO NEAR NIKISKI. THERE IS
ALSO SOME SEA ICE WITHIN PROTECTED AREAS ON THE WEST SIDE OF COOK
INLET TO KAMISHAK BAY. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH SATURDAY FOR COOK INLET...TEMPERATURES ARE
EXPECTED TO REMAIN NEAR FREEZING THROUGH MONDAY. THE ICE EDGE IS
EXPECTED TO REMAIN IN THE SAME AREA THROUGH SATURDAY.

PLEASE NOTE...COOK INLET SEA ICE CHANGES SIGNIFICANTLY WITH THE
TIDES.

$$



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