Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 080001
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
301 PM AKST WEDNESDAY 7 DECEMBER 2016

FORECAST VALID...MONDAY 12 DECEMBER 2016

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...HIGH PRESSURE WILL CONTINUE ACROSS MUCH OF THE
BEAUFORT...CHUKCHI AND BERING SEAS THROUGH MONDAY. A FEW WEAK FRONTS
WILL SKIRT THE FAR WESTERN BERING SEA NEAR THE RUSSIAN COAST.

-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 66.0N 168.4W TO
66.4N 168.8W TO 67.3N 167.7W TO 69.9N 167.5W TO 72.6N 164.9W TO
72.0N 173.3W TO 69.3N 173.3W TO 67.8N 169.3W TO 67.3N 169.5W TO
67.2N 170.3W TO 66.0N 169.4W THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH MONDAY FOR THE CHUKCHI SEA...SOUTHERLY WINDS ARE
EXPECTED TO CONTINUE THROUGH FRIDAY BEFORE WINDS BECOME LIGHT AND
VARIABLE THROUGH THE WEEKEND. THE MAIN ICE EDGE IS EXPECTED TO
CONDENSE BACK TO THE NORTH 10 TO 20 NM THROUGH MONDAY.

THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM 57.3N 158.4W TO
58.0N 158.1W TO 57.8N 159.3W TO 60.0N 168.3W TO 61.6N 168.7W TO
62.9N 167.6W TO 64.6N 167.5W TO 65.5N 168.7W TO 64.9N 170.1W 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 MONDAY FOR THE BERING SEA...WINDS ALONG THE WEST
COAST OF ALASKA ARE EXPECTED TO REMAIN OFFSHORE (FROM THE NORTHEAST)
WHICH WILL LIKELY AID IN THE SHIFTING OF NEWLY FORMED SEA ICE TO THE
WEST AND SOUTHWEST. AREAS OF OPEN WATER FORMED BY THE SHIFTING OF
NEW SEA ICE WILL LIKELY RE-FREEZE RAPIDLY WITH SEA SURFACE
TEMPERATURES REMAINING PRIMED FOR ICE GROWTH. WE EXPECT THE ICE EDGE
OFF THE WEST COAST TO EXPECTED TO THE WEST-SOUTHWEST 15 TO 25 NM
THROUGH MONDAY.

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

COOK INLET ANALYSIS CONFIDENCE...HIGH

SYNOPSIS FOR COOK INLET...A WEAK AREA OF LOW PRESSURE NEAR KODIAK
ISLAND WILL CONTINUE TO DROP SOUTH THROUGH THURSDAY BEFORE
DISSIPATING. THIS WILL ALLOW HIGH PRESSURE TO CONTINUE ACROSS THE
NORTHERN GULF AND COOK INLET THROUGH MONDAY.

THE MAIN ICE EDGE EXTENDS FROM 60.5N 151.3W TO 60.7N 151.6W TO
61.1N150.8W TO 61.1N 151.2W. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST FOR COOK INLET THROUGH MONDAY...SEA ICE IS EXPECTED TO
CONTINUE FORMING IN UPPER COOK INLET THROUGH MONDAY AS DAYTIME HIGHS
REMAIN WELL BELOW FREEZING. EXPECT SEA ICE TO SLOWLY INCREASE IN
THICKNESS AND CONCENTRATION AND EXPAND SOUTHWARD 10 TO 15 NM THROUGH
MONDAY.

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

$$



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