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FZAK80 PAFC 220041

Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters 
National Weather Service Anchorage Alaska 
340 PM AKST Wednesday 21 February 2018

FORECAST VALID...Monday 26 February 2018


SYNOPSIS...A low will move eastward across the Bering Sea through 
Thursday...then a much weaker low will move eastward across the 
Bering Sea Friday 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 58.8N 157W to 
58.6N 162.3W to 59.4N 162.7W to 59.8N 167.3W to 61.5N 168.1W to 
63.5N 172.2W to 64.3N 171.8W and continues in Russian waters. The 
ice edge is mainly open water.

FORECAST FOR THE BERING SEA (Days 1 through 5)...Winds will become 
westerly Thursday then northerly to northwesterly Friday. For 
Saturday through Monday, winds will be easterly on the north side of 
the low while they are westerly on the south side of the low. The 
ice pack is expected to continue melting through Friday...then areas 
of recently melted sea ice will likely begin freezing again as winds 
become light Saturday through Monday. The ice edge may expand 
southwestward 30 to 40 NM by Saturday...however the extent of 
freezing will depend on the track of the second low and how light 
the winds become for different areas of the Bering Sea.

-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 60.3N 151.4W to 59.8N 152.5W to 59.8N 152.6W. The ice 
edge is mainly open water.

FORECAST FOR COOK INLET (Days 1 through 5)...Winds will generally 
remain light and variable over the Cook Inlet region through 
Monday...however some moderate southerly to westerly winds are 
expected south of Kalgin Island Thursday night into Friday. Daily 
high temperatures are expected to continue to be near freezing with 
overnight lows in the teens. Some sea ice within Cook Inlet may melt 
as air temperatures rise toward freezing each day, especially south 
of Kalgin Island, resulting in the ice edge retreating up to 15 NM 
northward by Monday.

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


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Fax: 1-907-271-3711
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Page Modified: 03 Feb 2008 18:00 UTC
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