Ice Analysis Layer: Concentration Stage Forecast  Legend

827
FZAK80 PAFC 232258
ICEAFC

Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters
National Weather Service Anchorage Alaska
258 PM AKDT Monday 23 April 2018

FORECAST VALID...Saturday 28 April 2018

ANALYSIS CONFIDENCE...High

SYNOPSIS...A strong low will move from the southern Bering Sea to
the Bering Strait and gradually weaken through Thursday. Another low
will move through the far western Bering Thursday into Saturday.

-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 62.5N 167.5W,
then continues to 64.2N 171W to 63.4N 173W to 63.5N 173.4W to the
Russian coast near 64.3N 172.9W. 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 will remain
out of the east-northeast through Wednesday morning, then shift to a
generally southerly direction through Saturday. The ice edge is
expected to shift slightly to the southwest through Wednesday, then
retreat back to the north by 15 to 30 nm through Saturday.

-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 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 Saturday. The remaining Cook Inlet sea
ice will continue to gradually melt out through Saturday.

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

Regional Information

Downloads: Shapefile : KMZ | last updated Mon Apr 23 15:26:13 AKDT 2018

Ice Concentration	Ice Stage	5 Day Ice Forecast

 

Cook Inlet Sector

Ice Concentration	Ice Stage

 

Sea Surface Temperature Analysis

Regional Analysis

 

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