Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 230026
ICEAFC

Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters
National Weather Service Anchorage Alaska
315 PM AKST Monday 22 January 2018

FORECAST VALID...Saturday 27 January 2018

ANALYSIS CONFIDENCE...High to moderate

SYNOPSIS...A trough of low pressure over the northern and eastern
Bering Sea will dissipate by Thursday, then high pressure will build
over the Bering Sea through Saturday.

-Arctic Ocean-
-Beaufort Sea-
-Chukchi Sea-
-Bering Sea-
PKZ200-Norton Sound-
PKZ215-Kotzebue Sound-
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-
PKZ245-Flaxman Island to Demarcation Point-
PKZ500-Western U.S. Arctic Offshore-
PKZ505-Central U.S. Arctic Offshore-
PKZ510-Eastern U.S. Arctic Offshore-

Ice covered.

-Bering Sea-
PKZ160-Bristol Bay-
PKZ180-Kuskokwim Delta and Etolin Strait-
PKZ181-North and west of Nunivak Island-
PKZ210-Dall Point to Wales-

The main ice edge in the Bering Sea extends from near 57.4N 158.3W
to 58.2N 157.8W to 59.7N 168.4W to 63N 172.4W to 63.1N 175W to 64.2N
171.6W and continues into Russian waters. The ice edge is mainly
open water.

FORECAST FOR THE BERING SEA (Days 1 through 5)...Light easterly
winds will become moderate northerly Thursday through Saturday. The
ice edge is expected to advance southward 20 to 30 NM through
Saturday, with strips of ice likely being pulled off the main ice
pack as well as some new ice growth near the ice edge.

-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

SEA ICE EDGE DISCUSSION...The main ice edge within Cook Inlet
extends from near 60.6N 151.3W to 60.5N 151.8W to 60.7N 151.9W.
There is also sea ice within protected areas on the west side of
Cook Inlet to Kamishak Bay. The ice edge is mainly open water.

FORECAST FOR COOK INLET (Days 1 through 5)...Temperatures are
expected to remain below freezing through Saturday, with even colder
air moving into the Cook Inlet region during the latter half of the
week. New sea ice is expected to grow and the existing ice will move
southward. Overall, the ice edge is expected to advance 10 to 20 NM
southward.

Please note...Cook Inlet sea ice changes significantly with the
tides.

$$


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