Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 022311
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
211 PM AKST FRIDAY 2 DECEMBER 2016

FORECAST VALID...WEDNESDAY 7 DECEMBER 2016

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...HIGH PRESSURE WILL BUILDING NORTHWARD INTO THE CHUKCHI
AND BEAUFORT SEAS THROUGH SUNDAY...THEN WILL MOVE EASTWARD THROUGH
WEDNESDAY. A SERIES OF LOWS WILL MOVE EASTWARD ACROSS THE SOUTHERN
BERING SEA THROUGH WEDNESDAY.

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

ICE COVERED.

-CHUKCHI SEA-
-BERING SEA-

PKZ160-BRISTOL BAY-
PKZ180-KUSKOKWIM DELTA TO ETOLIN STRAIT-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-
PKZ220-WALES TO CAPE THOMPSON-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE EXTENDS FROM NEAR 57.5N 157.8W TO NEAR CAPE
NEWENHAM TO 59.6N 166.3W TO 66.4N 168.3W TO 67.2N 165.4W TO 69.6N
168.2W TO 70.6N 163W TO 72.2N 167W TO 71.8N 174.6W TO 66N 169.2W TO
64.1N 172.6W AND CONTINUES IN RUSSIAN WATERS. THE ICE EDGE IS MAINLY
OPEN WATER.

FORECAST THROUGH WEDNESDAY FOR THE CHUKCHI SEA...NORTHERLY TO
NORTHWESTERLY WINDS WILL CONTINUE THROUGH SATURDAY...THEN BECOME
SOUTHERLY TO SOUTHEASTERLY THROUGH WEDNESDAY. THE MAIN ICE EDGE IS
EXPECTED TO EXPAND TO THE SOUTHEAST 10 TO 20 NM THROUGH
SATURDAY...THEN TO THE NORTH-NORTHWEST 15 TO 25 NM THROUGH WEDNESDAY.

FORECAST THROUGH WEDNESDAY FOR THE BERING SEA...AS THE SERIES OF
LOWS PASSES OVER THE SOUTHERN BERING SEA THROUGH MONDAY...WINDS ARE
EXPECTED TO MAINLY BE OFFSHORE THROUGH WEDNESDAY WITH BRIEF PERIODS
OF LIGHT WINDS IN BETWEEN WEATHER SYSTEMS. THESE OFFSHORE WINDS ARE
EXPECTED TO AID IN SHIFTING NEWLY FORMED SEA ICE OFF TO THE WEST AND
NORTHWEST WITH WATER SURFACES BEHIND THIS ICE RAPIDLY FREEZING OVER
WITH NEW SEA ICE. WE EXPECT THE ICE EDGE OFF THE WEST COAST TO
EXPAND TO THE WEST 15 TO 30 NM THROUGH WEDNESDAY...AND WE EXPECT THE
ICE IN BRISTOL BAY TO INCREASE UP TO 10NM THROUGH WEDNESDAY.

-COOK INLET-
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-

COOK INLET ANALYSIS CONFIDENCE...HIGH TO MODERATE

SYNOPSIS FOR COOK INLET...HIGH PRESSURE WILL BUILD TO THE NORTH OF
COOK INLET THROUGH WEDNESDAY.

THE MAIN ICE EDGE EXTENDS FROM NEAR 60.8N 151W TO 61.1N 150.6W TO
NEAR TYONEK. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST FOR COOK INLET THROUGH WEDNESDAY...SEA ICE IS EXPECTED TO
CONTINUE FORMING IN UPPER COOK INLET THROUGH WEDNESDAY AS DAYTIME
HIGHS REMAIN WELL BELOW FREEZING. EXPECT SEA ICE TO SLOWLY INCREASE
IN THICKNESS AND CONCENTRATION AND EXPAND SOUTHWARD UP TO 15NM
THROUGH WEDNESDAY.

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

$$


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