Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 232245

Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters
National Weather Service Anchorage Alaska
245 PM AKDT Friday 23 March 2018

FORECAST VALID...Wednesday 28 March 2018


SYNOPSIS...A weakening low over northeast Russia will continue to
dissipate through tonight. The next system will track into the
central Bering Saturday morning, then into the eastern Bering by
Sunday morning. The low will weaken and move inland by Wednesday
with some ridging building over the Bering in its wake.

-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 Egegik to
59.4N 162.1W to 60.1N 168.1W to 64.3N 177.6W and continues along the
Russian coast. The ice edge is mainly open water.

FORECAST FOR THE BERING SEA (Days 1 through 5)...Over the northern
Bering, Yukon delta, and southern Chukchi Sea, winds are expected to
remain generally southerly through Saturday morning, shifting to the
east Sunday morning, and eventually becoming northerly Sunday
evening through Tuesday. This will cause continued melting and
compaction (up to 10 nm) along the ice edge under warmer southerly
flow, as well as ice progressing northward and westward before the
onset of northerly flow Sunday evening. As winds shift to the east,
and eventually north, ice will begin to pull away from western and
southern facing shorelines, anywhere from 20 to 30 nm.

From The Kuskokwim Delta and Nunivak Island south to the Bristol Bay
area, warmer south-to-southeasterly winds will persist through
Sunday morning, then switch to a colder west-to-southwesterly flow
as the front tracks inland Sunday night through Tuesday. The ice
edge along the western coast is expected to continue melting under
the persistent southerly flow, and track north-to-northwest along
the western coastline and remaining ice edge. Once the winds shift
to the colder westerly flow, any remaining ice should compact along
the coast, with some potential for new ice to form under colder

-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 Kenai to 60.3N 151.9W to 60.4N 151.9W to 60.4N 152.2W.
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. Ice is expected to
gradually decrease overall through the beginning of next week.

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

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