635
FZAK80 PAFC 200105
ICEAFC

Sea Ice Forecast for Western and Arctic Alaskan Coastal Waters
National Weather Service - Alaska Sea Ice Program
404 PM AKST Wednesday 19 February 2025

FORECAST VALID...Monday 24 February 2025

ANALYSIS CONFIDENCE...High to moderate.

SYNOPSIS...High pressure will persist over the Chukchi and Beaufort
Seas through Monday. Low pressure will generally remain over the
southern Bering Sea through Monday.

-BEAUFORT SEA-

PKZ505-Central US Arctic Offshore-
PKZ510-Eastern US Arctic Offshore-
PKZ813-Point Franklin to Cape Halkett out to 15 nm-
PKZ814-Cape Halkett to Flaxman Island out to 15 nm-
PKZ815-Flaxman Island to Demarcation Point out to 15 nm-
PKZ859-Point Franklin to Cape Halkett from 15 to 75 nm-
PKZ860-Cape Halkett to Flaxman Island from 15 to 80 nm-
PKZ861-Flaxman Island to Demarcation Point from 15 to 75 nm-

Ice covered.

FORECAST FOR THE BEAUFORT SEA (DAYS 1 through 5)...Forecast
confidence is high. Generally northeasterly winds will persist
through Monday. Overall, the ice pack will continue to thicken and
generally move southwest through the forecast period.

-CHUKCHI SEA-

PKZ500-Western US Arctic Offshore-
PKZ505-Central US Arctic Offshore-
PKZ807-Wales to Cape Espenberg out to 15 nm-
PKZ808-Cape Espenberg to Motherwood Point out to 10 nm-
PKZ809- Motherwood Point to Cape Krusenstern out to 10 nm-
PKZ810-Cape Krusenstern to Cape Thompson out to 15 nm-
PKZ811-Cape Thompson to Cape Beaufort out to 15 nm-
PKZ812-Cape Beaufort to Point Franklin out to 15 nm-
PKZ813-Point Franklin to Cape Halkett out to 15 nm-
PKZ855-Kotzebue Sound greater than 10 nm-
PKZ856-Wales to Cape Thompson greater than 15 nm-
PKZ857-Cape Thompson to Cape Beaufort from 15 to 85 nm-
PKZ858-Cape Beaufort to Point Franklin from 15 to 85 nm-
PKZ859-Point Franklin to Cape Halkett from 15 to 75 nm-

Ice covered.

FORECAST FOR THE CHUKCHI SEA (DAYS 1 through 5)...Forecast
confidence is high. Northerly to northeasterly winds will persist
across most of the Chukchi Sea through Monday. Overall, the ice pack
will continue to thicken while drifting south to southwest. Polynyas
may form off south and southwest-facing coastlines through Monday
but will quickly fill in with new sea ice.

-BERING SEA-

PKZ763-Kuskokwim Delta and Etolin Strait out to 15 nm-
PKZ765-North and West of Nunivak Island-
PKZ801-Etolin Strait to Dall Point out to 15 nm-
PKZ802-Dall Point to Kwikpak Pass out to 15 nm-
PKZ803-Kwikpak Pass to Cape Stephens out to 15 nm-
PKZ804-Cape Stephens to Moses Point out to 15 nm-
PKZ805-Moses Point to Sledge Island out to 15 nm-
PKZ806-Sledge Island to Wales out to 15 nm-
PKZ816-South side of Saint Lawrence Island out to 15 nm-
PKZ817-North side of Saint Lawrence Island out to 15 nm-
PKZ850-Etolin Strait to Kwemeluk Pass from 15 to 90 nm-
PKZ851-Southwest of Saint Lawrence Island from 15 to 100 nm-
PKZ852-Norton Sound greater than 15 nm-
PKZ853-Kwemeluk Pass to Kwikpak Pass from 15 to 90 nm-
PKZ854-Sledge Island to Wales greater than 15 nm-

Ice covered.

PKZ760-Bristol Bay greater than 15 NM-
PKZ761-Bristol Bay from Port Heiden to Cape Chichagof out to 15 nm-
PKZ762-Bristol Bay from Cape Chichagof to Cape Peirce out to 15 nm-
PKZ764-Kuskokwim Delta from 15 to 80 nm-
PKZ767-Saint Matthew Island Waters-

In the Bering Sea, the main ice edge extends from near Cape Newenham
to 58 38N 164 51W to 61 18N 172 34W to 61 20N 174 58W to 61
58N 178 33W and continues west into Russian waters. The ice edge
is open water.

From land-based points in Alaska, the main ice edge extends from
near Egegik to 85 nm west of Cape Newenham to 150 nm south of
Gambell to 170 nm south-southwest of Gambell to 190 nm southwest of
Gambell and continues west into Russian waters. The ice edge is open
water.

FORECAST FOR THE BERING SEA (DAYS 1 through 5)...Forecast confidence
is high. Northerly to northeasterly winds will persist across much
of the ice pack through Monday across much of the Bering Sea. Sea
ice will generally continue to thicken and drift southwest 20 to 30
nm through Monday.

To the south and east of Nunivak Island, expect easterly to
southerly winds as this area is closer to the low center that will
affect the southern Bering Sea. Much of the remaining sea ice in
northern Bristol Bay will melt as warmer air remains over the area.
Polynyas may form along south-facing coastlines especially within
Norton Sound but will quickly fill in with new sea ice.

-COOK INLET-

PKZ740-Cook Inlet North of Kalgin Island-

SYNOPSIS...Low pressure will remain south of Cook Inlet through
Saturday.

In Cook Inlet, the main ice edge extends from 60 24N 152 13W to 60
7N 152 1W to near Nikiski. The ice edge is open water.

From land-based points in Alaska, the main ice edge extends from 14
nm north of Tuxedni Bay to 10 nm west of Ninilchik to near Nikiski.
The ice edge is open water.

FORECAST FOR COOK INLET (DAYS 1 through 5)...Forecast confidence is
high. Northeasterly winds will persist across the Cook Inlet region
through Monday. Temperatures will generally stay in the upper 20s to
upper 30s through Monday, so expect some gradual melting of the
existing sea ice as it drifts south overall.

&&
Schreck