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.
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-
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.
PKZ130-West of Barren Islands Including Kamishak Bay-
PKZ139-Cook Inlet Kalgin Island to Pt. Bede-
PKZ140-Cook Inlet North of Kalgin Island-
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