Ice Forecast
Issued by NWS Anchorage, AK

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737
FZAK80 PAFC 060015
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
311 PM AKST MONDAY 5 DECEMBER 2016

FORECAST VALID...SATURDAY 10 DECEMBER 2016

ANALYSIS CONFIDENCE...HIGH TO MODERATE

SYNOPSIS...HIGH PRESSURE WILL REMAIN OVER THE CHUKCHI AND BEAUFORT
SEAS THROUGH SATURDAY. A SERIES OF LOWS WILL MOVE EASTWARD ACROSS
THE SOUTHERN BERING SEA THROUGH SATURDAY.

-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 IN THE CHUKCHI SEA EXTENDS FROM NEAR POINT HOPE TO
69.9N 167.5W TO 70.6N 163.8W TO 71.8N 167.1W TO 71.2N 172.9W TO
66.4N 168.2W TO 67.5N 166.3W. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH SATURDAY FOR THE CHUKCHI SEA...SOUTHERLY WINDS WILL
CONTINUE THROUGH SATURDAY. THE MAIN ICE EDGE IS EXPECTED TO
CONDENSE BACK TO THE NORTH 20 TO 30 NM THROUGH SATURDAY.

THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM NEAR 57.3N 158.2W
TO 59.2N 166.7W TO 63.8N 166.9W TO 65.7N 169.6W TO 64.1N 172.4W AND
CONTINUES ALONG THE RUSSIAN COAST. THE ICE EDGE IS MAINLY OPEN
WATER. THERE IS ALSO NEW SEA ICE ALONG THE COAST OF SAINT
LAWRENCE ISLAND.

FORECAST THROUGH SATURDAY FOR THE BERING SEA...AS THE SERIES OF LOWS
PASSES OVER THE SOUTHERN BERING SEA THROUGH SATURDAY...WINDS ARE
EXPECTED TO MAINLY BE OFFSHORE 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 SATURDAY.

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

COOK INLET ANALYSIS CONFIDENCE...HIGH

SYNOPSIS FOR COOK INLET...HIGH PRESSURE WILL BUILD TO THE NORTH OF
COOK INLET THROUGH WEDNESDAY...WHILE A LOW MOVES EASTWARD ACROSS
THE GULF OF ALASKA.

THE MAIN ICE EDGE EXTENDS FROM NEAR 61N 150.9W TO NEAR TYONEK...AND
CONTINUES ALONG THE COASTLINE FROM TYONEK TO KAMISHAK BAY. THE ICE
EDGE IS MAINLY OPEN WATER.

FORECAST FOR COOK INLET THROUGH SATURDAY...SEA ICE IS EXPECTED TO
CONTINUE FORMING IN UPPER COOK INLET THROUGH SATURDAY AS DAYTIME
HIGHS REMAIN WELL BELOW FREEZING. EXPECT SEA ICE TO SLOWLY INCREASE
IN THICKNESS AND CONCENTRATION AND EXPAND SOUTHWARD 10 TO 20NM
THROUGH SATURDAY.

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

$$



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