Ice Forecast
Issued by NWS Anchorage, AK

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3
FZAK80 PAFC 252251

Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters
National Weather Service Anchorage Alaska
250 PM AKDT Wednesday 25 April 2018

FORECAST VALID...Monday 30 April 2018


SYNOPSIS...A strong low near the Bering Strait will gradually weaken
through Friday night. Another series of lows will move from west to
east across the Bering Sea Thursday night through Monday.

-Arctic Ocean-
-Beaufort Sea-
-Chukchi Sea-
-Bering Sea-
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-
PKZ180-Kuskokwim Delta and Etolin Strait-
PKZ181-North and west of Nunivak Island-
PKZ200-Norton Sound-
PKZ210-Dall Point to Wales-

The main ice edge in the Bering Sea extends approximately 10 nm
offshore of the Alaskan coast from near Quinhagak to 63.3N 165.1W,
then continues to 64.2N 170.5W to 63.5N 173.7W to 63.6N 174.3W to
the Russian coast near 64.3N 173.5W. There is also additional sea
ice remaining in the western Gulf of Anadyr. 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 southerly through Saturday, then
become variable and shift around to the north Sunday into Monday.
The ice edge is expected to retreat to the north by 10 to 20 nm
through Monday.

-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 only sea ice that remains within Cook
Inlet is within the upper end of Knik Arm, at the mouth of the
Susitna River, and stranded on mudflats along portions of the coast.
Occasionally, some river ice will flow south from Knik Arm past the
Port of Anchorage before melting.

FORECAST FOR COOK INLET (Days 1 through 5)...Temperatures will
remain above freezing through Monday. The remaining Cook Inlet sea
ice will continue to gradually melt out through Monday.

Please note...Cook Inlet sea ice changes significantly with the
tides. is the U.S. government's official web portal to all federal, state and local government web resources and services.