####018004914#### FZAK80 PAFC 311842 ICEAFC Sea Ice Forecast for Western and Arctic Alaskan Coastal Waters National Weather Service - Alaska Sea Ice Program 1041 AM AKDT Monday 31 March 2025 FORECAST VALID...Saturday 6 April 2025 ANALYSIS CONFIDENCE...Moderate. SYNOPSIS...A large low pressure remains over the High Arctic with a front stretched southwestward into the western Bering Sea. High pressure sits over the central and eastern Bering Sea. A new low forms along the front in the northwest Bering Sea late Tuesday, then moves into the Chukchi Sea and dissipates on Wednesday. Late in the week a north Pacific system swings a front over the eastern Bering Sea/Bristol Bay. -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. Southwesterly winds will slowly diminish through Wednesday. Light westerly winds will persist through Thursday before high pressure builds over the Beaufort Sea on Saturday. Expect the pack ice to drift eastward around 5 nm/day, with the chance for shorefast ice break-off. Expect little movement late in the week. -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. Southwesterly winds will diminish through Tuesday with pack ice drifting 5-10 nm to the northeast. A transiting low over the area will make for variable movement on Wednesday in the vicinity of Point Hope/Kivalina area. Late in the week, light and variable winds will favor ice moving with tides and currents. -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 Egegik to 57 25’N 162 43’W to 57 33’N 168 34’W to 61 25’N 177 48’W and continues west into Russian waters. The ice edge is melted and compacted strips of ice. From land-based points in Alaska, the main ice edge extends from near Egegik to 75 nm south of Cape Newenham to 160 nm south of Cape Mohican to 220 nm south of Gambell and continues west into Russian waters. The ice edge is melted and compacted strips of ice. FORECAST FOR THE BERING SEA (DAYS 1 through 5)...Forecast confidence is high. Southwesterly to westerly winds will persist through Wednesday which will continue to retreat the ice edge 5-10 nm/day. As a north Pacific low develops, northerly winds will return, albeit lighter. During this time expect the ice to advance once again, on the order of 10-15 nm/day Thursday through Saturday. Less movement is expected from Saint Matthew Island westward. && Lawson