Ice Forecast

FZAK80 PAFC 152350
Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters 
National Weather Service Anchorage Alaska 
250 PM AKST Friday 15 December 2017 
FORECAST VALID...Wednesday 20 December 2017 
ANALYSIS CONFIDENCE...High to moderate
SYNOPSIS...A series of lows will move northeastward through the 
Bering Sea through Wednesday. High pressure will remain over the 
Arctic Ocean through Wednesday. 
-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-
FORECAST FOR THE CHUKCHI SEA (Days 1 through 5)...Easterly to 
northeasterly winds will continue through Monday...then winds will 
become southerly Tuesday through Wednesday. The remaining open water 
within the Chukchi Sea is expected to continue to fill in through 
Monday...then southerly winds Tuesday and Wednesday will likely 
break up the thinner ice and push existing ice northward. 
-Bering Sea-
PKZ160-Bristol Bay-
PKZ180-Kuskokwim Delta and Etolin Strait-
PKZ181-North and west of Nunivak Island-
PKZ210-Dall Point to Wales-
SEA ICE EDGE DISCUSSION...The main ice edge in the Bering Sea 
extends from 59.1N 162W to 61N 167.4W to 65.4N 168.6W to 64.3N 
172.8W and continues in Russian waters. 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)...Winds will be 
variable through Wednesday as the lows move through the Bering Sea. 
Some sea ice is expected to be destroyed by wind and wave action 
through Wednesday. The overall ice edge is expected to retreat 10 to 
20 nm toward the Alaska coast through Wednesday.
-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 to moderate
SEA ICE EDGE DISCUSSION...The main ice edge within Cook Inlet 
extends from near 60.9N 150.9W to 61N 151W to 61N 150W to 61.2N 
150.7W 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 remain below freezing through Wednesday. New sea ice can 
be expected to form within upper Cook Inlet with the below-
freezing temperatures. 
Please note...Cook Inlet sea ice changes significantly with the