Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 210008
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
308 PM AKST MONDAY 20 NOVEMBER 2017

FORECAST VALID THROUGH...WEDNESDAY 22 NOVEMBER 2017

ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS...A STRONG LOW WILL MOVE INTO THE CHUKCHI THROUGH
SATURDAY...SLOWLY DISSIPATING. ANOTHER LOW WILL MOVE INTO THE BERING
SEA ON WEDNESDAY AND MOVE INLAND OVER THE SOUTHWEST MAINLAND ON
THURSDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-

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

ICE COVERED.

-BEAUFORT SEA-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE BEAUFORT SEA EXTENDS FROM NEAR POINT BARROW
TO 72.3N 154.3W TO 72.3N 156.6W CONTINUES WESTWARD INTO THE CHUKCHI
SEA. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH SATURDAY FOR THE BEAUFORT SEA...GENERALLY EASTERLY
WINDS WILL PERSIST THROUGH THURSDAY. SEA ICE WILL CONTINUE TO FILL
IN THE BEAUFORT SEA THROUGH SATURDAY AND DRIFT TO THE NORTHWEST 10
TO 20 NM DURING THAT TIME.

-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 73.9N 162.8W TO 74.6N 170.1W TO 75.4N
169.7W TO 74N 172.6W TO 73.6N 176.6W 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 SATURDAY FOR THE CHUKCHI SEA...WINDS WILL GENERALLY
BE MODERATE EASTERLY ALONG AND NEAR THE ICE EDGE THROUGH WEDNESDAY
THEN SHIFT TO THE NORTH AND NORTHWEST THROUGH SATURDAY. THE MAIN ICE
EDGE IS EXPECTED TO RETREAT 15 TO 30 NM NORTHWESTWARD THROUGH
SATURDAY. SEA ICE ALONG THE CHUKCHI SEA COAST AND WITHIN KOTZEBUE
SOUND MAY EXPAND WESTWARD UP TO 10NM THROUGH SATURDAY.

-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 THE KUSKOKWIM RIVER
DELTA.

FORECAST THROUGH SATURDAY FOR THE BERING SEA...VARIABLE WINDS CAN BE
EXPECTED THROUGH SATURDAY AS A SERIES OF LOWS MOVE THROUGH THE
BERING SEA. VERY LITTLE NEW ICE GROWTH IS EXPECTED 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...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 SATURDAY FOR COOK INLET...COLDER TEMPERATURES ARE
EXPECTED TO PERSIST THROUGH SATURDAY. THEREFORE SEA ICE IS EXPECTED
TO CONTINUE TO FORM AND THICKEN THROUGH SATURDAY.

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

$$



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