National Weather Service United States Department of Commerce

Our ASIP is staffed 7 days a week from 6:30 am to 3:30 pm
Operations Phone Line: 907.266.5138
Operations Email:

Ice Analysis Layer: Concentration Stage Forecast  Legend

FZAK80 PAFC 140048 CCA

Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters
National Weather Service Anchorage Alaska
330 PM AKST Wednesday 13 December 2017

Forecast Valid...Monday 18 December 2017
Analysis Confidence...High

A series of lows will move northeastward through the Bering Sea
through Monday. High pressure will remain over the Arctic Ocean
through Monday.

-Arctic Ocean-
-Beaufort Sea-
-Chukchi Sea-
-Bering Sea-
PKZ200-Norton Sound-
PKZ215-Kotzebue Sound-
PKZ235-Point Franklin to Cape Halkett-
PKZ240-Cape Halkett to Flaxman Island-
PKZ245-Flaxman Island to Demarcation Point-
PKZ505-Central U.S. Arctic Offshore-
PKZ510-Eastern U.S. Arctic Offshore-

Ice covered.

-Chukchi Sea-
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 18nm
offshore Wales to 66.8N 166.5W to 68N 170.9W to 66N 169.1W and
continues in the Bering Sea. The ice edge is mainly open water.

.FORECAST FOR THE CHUKCHI SEA (Days 1 through 5)...
Strong northeast winds will persist through Monday. The remaining
open water within the Chukchi Sea is expected to continue to fill in
through Monday...however the strong northeast winds may hinder new
ice growth somewhat.

-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 59.2N 162.1W to
59.4N 164.5W to 61N 167.4W to 63.4N 166.4W to approximately 18 NM
offshore Wales. There is also new ice near the coastline of Saint
Lawrence Island as well as within shallow and protected areas of
Bristol Bay. The ice edge is mainly open water.

.FORECAST FOR THE BERING SEA(Days 1 through 5)...
North of Nunivak Island...Westerly winds will become easterly Friday
then northerly Saturday. The ice edge is expected to move
southwestward up to 20 NM through Monday.

Nunivak Island South...Northerly winds will become southeasterly
Thursday...then quickly change to southerly then northwesterly as a
low moves through Friday and Saturday. The northwesterly winds will
persist through Monday. Sea ice along the ice edge may melt during
the period of southerly winds...otherwise the ice edge is expected
to advance southward up to 20 NM.

-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

The main ice edge within Cook Inlet extends from near 60.9N 150.9W
to 61N 149.6W to 61.2N 150.8W to 61N 151.2W. 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 drop below freezing through Monday. New
sea ice can be expected to form within upper Cook Inlet as the
temperatures drop below freezing.

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


Regional Information

Downloads: Shapefile : KMZ | last updated Thu Dec 14 14:54:51 AKST 2017

Ice Concentration Ice Stage 5 Day Ice Forecast


Cook Inlet Sector

Ice Concentration Ice Stage


Sea Surface Temperature Analysis

Regional Analysis


Save this page by clicking here
Please follow this link (here) to see the latest satellite resources posted.