Ice Forecast

FZAK80 PAFC 212311
Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters 
National Weather Service Anchorage Alaska 
311 PM AKDT Wednesday 21 March 2018
FORECAST VALID...Monday 26 March 2018
ANALYSIS CONFIDENCE...High to moderate 
SYNOPSIS...A low will move north along the Kamchatka Peninsula 
through Friday as high pressure builds over the eastern Bering Sea. 
Another low will approach the Western Aleutians by Saturday, move 
into the southeastern Bering Sea by Sunday night, and remain nearly 
stationary there through Monday. 
-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 58.1N 157.5W 
to 59.8N 168.2W to 64.3N 177.6W and continues in Russian waters. The 
ice edge is mainly open water.
FORECAST FOR THE BERING SEA (Days 1 through 5)...Winds along the 
Bering Sea ice edge will remain generally southerly through Friday, 
then become light and variable going into the weekend and easterly 
to northeasterly Sunday night into Monday. The ice edge is expected 
to compact and retreat to the north by 25 to 40 NM through Monday. 
Expect some movement away from north facing shores and toward south 
facing shores through Friday, then the sea ice will begin moving 
southward again as winds become more northerly. 
-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 60.6N 152.2W to 60.5N 151.8W to 60.2N 151.8W to 60.4N 
151.4W to 60.6N 151.4W. There is also sea ice within Kamishak Bay. 
The ice edge is mainly open water.
FORECAST FOR COOK INLET (Days 1 through 5)...Air temperatures are 
expected to drop below freezing each night but climb to the mid to 
upper 30s during the day through the weekend. Winds will become 
northerly through Thursday and then become light and variable 
through Monday. Expect the ice to continue melting with highs 
climbing above freezing each day, likely bringing the ice edge north 
up to 20 nm by Monday.
Please note...Cook Inlet sea ice changes significantly with the