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FZAK80 PAFC 302154

ICEAFC



Sea Ice Forecast for Western and Arctic Alaskan Coastal Waters 

National Weather Service - Alaska Sea Ice Program 

154 PM AKDT Wednesday 30 April 2025



FORECAST VALID...Monday 5 May 2025.



ANALYSIS CONFIDENCE...High.



SYNOPSIS...A series of lows will move east along the Aleutian 

Islands through Monday. High pressure will persist over the Chukchi 

and Beaufort Seas through the forecast period.

 

-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. Northeasterly to easterly winds will persist 

through Monday. Expect sea ice to slowly drift west-southwestward 

through the forecast period, though sea ice near the Alaska 

coastline will likely move very little overall.



-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. Northeasterly to easterly winds will generally 

persist through Monday. The polynya off the northwest coast of 

Alaska will persist and continue to fill in with new ice. Multi-year 

sea ice will continue to drift west to southwest across the Chukchi 

Sea generally north of Wainwright. Otherwise sea ice is expected to 

remain fairly stationary through Monday.



-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.



PKZ414-Bering Sea Offshore East of 171W-

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-



The main ice edge extends from near Quinhagak to 59 27’N 163 29’W to 

59 59’N 164 51’W to 57 46’N 167 41’W to 57 37’N 171 25’W to 60 43’N 

179 25’W and continues into Russian waters. The ice edge is open 

water. 



From land-based points in Alaska, the main ice edge extends from 

near Quinhagak to 25 nm south of Kipnuk to 25 nm west of Kipnuk to 

75 nm northeast of Saint Paul to 45 nm northwest of Saint Paul to 

280 nm southwest of Gambell and continues into Russian waters. The 

ice edge is open water. 



FORECAST FOR THE BERING SEA (DAYS 1 through 5)...Forecast confidence 

is high. North to northwest winds will persist through Monday across 

the Bering Sea ice pack. Polynyas will continue to expand and will 

generally remain open, especially south of Saint Lawrence Island and 

in eastern Norton Sound. The ice pack overall will continue to melt 

and sea ice concentrations will decrease through the forecast 

period.  



&& 

Schreck