####018004703#### FZAK80 PAFC 282213 ICEAFC Sea Ice Forecast for Western and Arctic Alaskan Coastal Waters National Weather Service - Alaska Sea Ice Program 213 PM AKDT Monday 28 April 2025 FORECAST VALID...Saturday 3 May 2025. ANALYSIS CONFIDENCE...High to moderate. SYNOPSIS...A low tracks east along the southern Bering Sea and into the Gulf of Alaska by Wednesday. High pressure briefly builds over the western Bering Sea on Wednesday and Thursday before another low tracks east along the Aleutian Chain. Through the forecast period, high pressure will generally persist across the northern Chukchi Sea, Beaufort Sea, and High Arctic. The southern Chukchi Sea can expect low pressure through Saturday. -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 winds will persist through Saturday. 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 winds will generally persist through Saturday. The polynya off the northwest coast of Alaska will persist and continue to fill in with new ice. Otherwise sea ice is expected to remain fairly stationary through Saturday. -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 36’N 164 12’W to 57 42’N 167 21’W to 57 51’N 170 7’W to 58 45’N 172 51’W to 60 1’N 177 21’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 20 nm south of Kipnuk to 100 nm northeast of Saint Paul to 45 nm north of Saint Paul to 95 nm south of Saint Matthew Island to 130 nm southwest of Saint Matthew Island and continues into Russian waters. The ice edge is open water. FORECAST FOR THE BERING SEA (DAYS 1 through 5)...Forecast confidence is high. Winds near the ice edge and across the main ice pack will be northerly to northwesterly through Saturday. Sea ice will continue to be quite mobile through the forecast period, and the ice pack will continue to break apart/concentrations will continue to decrease. && Fenrich