340
FZAK80 PAFC 172154
ICEAFC

Sea Ice Forecast for Western and Arctic Alaskan Coastal Waters
National Weather Service - Alaska Sea Ice Program
154 PM AKDT Friday 17 October 2025

FORECAST VALID...Wednesday 22 October 2025

ANALYSIS CONFIDENCE...Moderate.

SYNOPSIS...Several lows will track east along the Aleutian Islands
to the Gulf of Alaska through the forecast period while high
pressure strengthens across the Beaufort Sea, High Arctic, and
northern Chukchi Sea. On Tuesday and Wednesday, low pressure will
spread across the Beaufort and Chukchi Seas.

-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 45 to 140 nm-
PKZ860-Cape Halkett to Flaxman Island from 45 to 60 nm-
PKZ861-Flaxman Island to Demarcation Point from 20 to 45 nm-

The main ice edge in the Beaufort Sea extends from to 72 8N 154
55W to 70 13N 141 17W and continues east into Canadian waters.
The ice edge is open water.

From land-based points in Alaska, the main ice edge in the Beaufort
Sea extends from 60 nm north of Ikiak to 30 nm north of Demarcation
Point and continues east into Canadian waters. The ice edge is open
water.

FORECAST FOR THE BEAUFORT SEA (DAYS 1 through 5)...Forecast
confidence is high. Sea ice lingers within protected areas along the
north coast. Moderate easterly winds will persist through Sunday,
and then winds will lighten as they shift northeasterly starting
Monday. Light northerly to northeasterly winds will continue through
Wednesday. Expect sea ice within the main ice pack to move west at
about 10-15 nm per day through Sunday, and then ice will move south
at about 5-10 nm per day from Monday through Wednesday. Sea ice will
continue to grow within the main ice pack and along the coast
through the forecast period.

-CHUKCHI SEA-

PKZ500-Western US Arctic Offshore-
PKZ505-Central US Arctic Offshore-
PKZ812-Cape Beaufort to Point Franklin out to 15 nm-
PKZ813-Point Franklin to Cape Halkett out to 15 nm-
PKZ858-Cape Beaufort to Point Franklin from 15 to 85 nm-
PKZ859-Point Franklin to Cape Halkett from 15 to 75 nm-

The main ice edge in the Chukchi Sea extends from 72 8N 154 55W to
72 46N 169 44W and continues west into Russian waters. The ice
edge is open water.

From land-based points in Alaska, the main ice edge in the Chukchi
Sea extends from 60 nm north of Ikiak to 223 nm northwest of Point
Franklin and continues west into Russian waters. The ice edge is
open water.

FORECAST FOR THE CHUKCHI SEA (DAYS 1 through 5)...Forecast
confidence is high. Over the main ice pack, moderate easterly winds
will persist through Sunday and then shift northeasterly on Monday
and northerly on Tuesday and Wednesday. Expect sea ice to move west
about 10-15 nm per day through Sunday, and then south/southwest
about 5-10 nm per day from Monday through Wednesday. Air
temperatures will trend cooler towards the end of the forecast
period. Expect sea ice growth within the main ice pack through the
forecast period.

&&
Fenrich