544
FZAK80 PAFC 232311
ICEAFC

Sea Ice Forecast for Western and Arctic Alaskan Coastal Waters
National Weather Service - Alaska Sea Ice Program
311 PM AKDT Wednesday 18 June 2025

FORECAST VALIDSaturday 28 June 2025


ANALYSIS CONFIDENCEHigh


SYNOPSISHigh pressure will persist across the Chukchi Sea and
Beaufort Sea through Saturday, though a low will track west across
the Alaska mainland toward the Bering Strait region Wednesday
through Friday.


-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. Easterly winds will persist through Saturday.
Sea ice will drift to the west through the forecast period, and some
shorefast ice may break off 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.


The main ice edge extends from near Diomede to 67 14N 168W to 66
24N 166 36W to 67 24N 165 24W to 69 8N 169 41W and continues
in Russian waters. The ice edge is open water.


From land-based points in Alaska, the main ice edge extends from
near Diomede to 90 nm north of Diomede to 15 nm northwest of
Shishmaref to 65 nm northeast of Shishmaref to 75 nm west of Cape
Lisburne and continues in Russian waters. The ice edge is open
water.


FORECAST FOR THE CHUKCHI SEA (DAYS 1 through 5)...Forecast
confidence is high. South of Wainwright, winds will become light and
variable Tuesday through early Wednesday, then winds will be
northerly late Wednesday through Friday, then near the Bering Strait
winds will become southerly late Friday through Saturday. North of
Wainwright, easterly winds will persist through Wednesday, then
winds will become northerly Thursday and Friday, then light and
variable Saturday.


-BERING SEA-


PKZ806-Sledge Island to Wales out to 15 nm-
PKZ817-North side of Saint Lawrence Island out to 15 nm-
PKZ854-Sledge Island to Wales greater than 15 nm-


There is a small area of sea ice remaining just north of Saint
Lawrence Island east of Savoonga.


FORECAST FOR THE BERING SEA (DAYS 1 through 5)...Forecast confidence
is high. Over the remaining sea ice, winds will generally be
northerly through Saturday. Sea ice will continue to melt and is
expected to melt completely by Satursday.


&&
Schreck/Lawson