Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 222354
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
253 PM AKST WEDNESDAY 22 NOVEMBER 2017

FORECAST VALID THROUGH...MONDAY 27 NOVEMBER 2017

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...A STRONG LOW OVER THE EASTERN CHUKCHI WILL MOVE INLAND ON
FRIDAY AND SLOWLY DISSIPATE. A MODERATE STRENGTH FRONT WILL MOVE
INTO THE CHUKCHI ON FRIDAY. ANOTHER LOW WILL MOVE INTO THE BERING
SEA ON SATURDAY AND MOVE INTO THE GULF ON MONDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-

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

ICE COVERED.

-CHUKCHI SEA-
PKZ215-KOTZEBUE SOUND-
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 APPROXIMATELY 55
NM NORTH OF POINT BARROW TO 74.6N 170.5W TO 73.1N 177.4W AND
CONTINUES IN RUSSIAN WATERS. THERE IS ALSO SEA ICE ALONG THE WEST
COAST OF ALASKA FROM 69.1N 163.7W TO POINT BARROW AS WELL AS WITHIN
KOTZEBUE SOUND.

FORECAST THROUGH MONDAY FOR THE CHUKCHI SEA...WINDS WILL GENERALLY
BE NORTHWESTERLY THROUGH FRIDAY WHILE SLOWLY WEAKENING THEN SHIFT TO
SOUTHEAST AT MODERATE STRENGTH THROUGH MONDAY. THE MAIN ICE EDGE IS
EXPECTED TO RETREAT 15 TO 30 NM NORTHWESTWARD THROUGH MONDAY FROM
WRANGELL ISLAND NORTH. SOUTH OF WRANGELL ISLAND...EXPECT THE ICE
EDGE TO EXPAND 10 TO 20 NM. SEA ICE ALONG THE CHUKCHI SEA COAST AND
WITHIN KOTZEBUE SOUND MAY EXPAND WESTWARD UP TO 10NM THROUGH
MONDAY.

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

NEW AND YOUNG SEA ICE HAS BEEN OBSERVED WITHIN THE SHALLOW AND
PROTECTED AREAS FROM THE BERING STRAIT SOUTH TO BRISTOL BAY.

FORECAST THROUGH MONDAY FOR THE BERING SEA...VARIABLE WINDS CAN BE
EXPECTED THROUGH MONDAY AS A SERIES OF LOWS MOVE THROUGH THE BERING
SEA. VERY LITTLE NEW ICE GROWTH IS EXPECTED THROUGH MONDAY.

-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 TO HIGH

NEW AND YOUNG SEA ICE HAS BEEN OBSERVED NORTH OF A LINE FROM THE
SUSITNA RIVER DELTA TO POINT POSSESSION...AS WELL AS WITHIN
PROTECTED AREAS ON THE WEST SIDE OF COOK INLET TO KAMISHAK
BAY.

FORECAST THROUGH MONDAY FOR COOK INLET...COLDER TEMPERATURES ARE
EXPECTED TO PERSIST THROUGH MONDAY. THEREFORE SEA ICE IS EXPECTED TO
CONTINUE TO FORM AND THICKEN THROUGH MONDAY.

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

$$


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