Aleutian wind warnings extend overnight, with 32-foot seas forecast

Thirty-two-foot seas are forecast for Thursday on the Pacific side of the Aleutian waters between Kiska and Attu. On the Bering Sea side, the forecast is 31 feet—not much relief for a vessel facing powerful winds that change direction overnight. These are predicted sea conditions, not verified measurements. ^{1 2}

The National Weather Service office in Anchorage issued hurricane-force wind warnings for both areas at 3:08 p.m. Alaska Daylight Time on Wednesday, October 7, 2026. Their headlines carry the warning period through 5 a.m. AKDT Thursday, October 8, twelve hours beyond the earlier headline deadline. But that clock does not mark a forecast return to safe water: Thursday’s outlook still calls for southwest winds of 50 knots on both sides of the island chain. ^{1 2 3}

The two warnings are not interchangeable. For the Kiska-to-Attu Bering Side, southeast winds of 65 knots early Wednesday night are forecast to become west winds of 55 knots, with gusts to 65 knots, in the evening. Seas are forecast at 28 feet overnight, rising to 31 feet Thursday, with rain showers. The sustained wind speed falls while the predicted seas rise. That is the consequential combination, rather than any single peak number. ¹

The Pacific Side forecast also begins with southeast winds of 65 knots, but its later west wind is 50 knots, with gusts to 65—not the Bering Side’s 55 knots. Thursday brings southwest winds of 50 knots and seas of 32 feet. The alerts establish which sea-height value belongs to each named area; they do not establish why the Thursday forecasts differ by one foot. ²

The warning’s name describes a wind hazard, not a tropical hurricane approaching Alaska. The NWS glossary defines a Hurricane Force Wind Warning as “A warning for sustained winds, or frequent gusts, of 64 knots (74 mph) or greater, either predicted or occurring, and not directly associated with a tropical cyclone.” The early-night forecast of 65 knots clears that threshold. ²⁵

Because the category includes frequent gusts, it does not require every subsequent sustained-wind figure to remain at hurricane force. Nor does the warning establish the storm’s track, central pressure or development. Those details are not established in the available reporting.

The sea-height figures need equal care. The Anchorage coastal forecast explains: “Sea forecasts represent an average of the highest one-third of the combined wind wave and swell height.” A 32-foot forecast is therefore not a stated maximum individual wave. Wind forecasts describe the predominant speed and direction expected. Neither convention turns a prediction into an observation. ⁷

Earlier alerts classified the hazard as Extreme, the urgency as Immediate and the response as Avoid. Their certainty field read Observed. That metadata label is not proof that each forecast wind speed or sea height was recorded. No casualty, vessel loss, rescue or damage report is established in the evidence for these warnings. ^{3 4 5}

The October 6 Pacific Side warning forecast south winds increasing from 45 to 70 knots Wednesday afternoon, with seas building from 21 to 30 feet. Bering Side warnings issued October 7 at 2:58 a.m. and 7:22 a.m. AKDT forecast the same afternoon wind increase, but seas building from 18 to 25 feet. From Shemya westward, those earlier Bering outlooks specified south winds increasing from 40 to 50 knots, with gusts to 65. These are superseded outlooks, not accounts of conditions that were measured. ^{3 4 5}

The morning Bering products also forecast 28-foot seas Wednesday night and 32-foot seas Thursday. The latest Bering forecast replaces that Thursday value with 31 feet; the latest Pacific value is 32 feet. Meanwhile, the earlier 70-knot afternoon outlook and the latest 65-knot early-night outlook describe different periods. They are not competing measurements of the same moment. ^{1 2 3 4}

The clearest timing change is the overnight extension. The earlier headline end was 5 p.m. AKDT October 7; the latest pair gives 5 a.m. AKDT October 8. A less clear issue remains inside the latest Pacific alert: its separate expiration field precedes its headline and end-field time by 90 minutes. ^{1 2 3 4}

The latest Pacific alert lists sent and effective times at 23:08 UTC October 7, with onset separately at 01:00 UTC October 8. In AKDT, those are 3:08 p.m. and 5 p.m. Wednesday. Its end field and headline agree on 13:00 UTC October 8—5 a.m. AKDT Thursday—but expiration is listed at 11:30 UTC, or 3:30 a.m. AKDT. The authoritative interpretation of that discrepancy has not been established. The earlier expiration alone does not establish that the hazard has been canceled. ^{2 43}

Alaska Daylight Time is UTC minus eight hours, not minus seven. A structured timestamp accompanying the Bering Side warning used the wrong offset; the correct UTC equivalent of its 5 a.m. AKDT headline end is 13:00 UTC. Western Aleutian civil time is different again: islands west of 169 degrees 30 minutes west use Hawaii-Aleutian Daylight Time, UTC minus nine. Adak, for example, is one hour behind Anchorage. The warnings’ explicitly labeled AKDT times should not silently be read as western Aleutian local times. ^{1 42 43}

Older alerts had timing problems too. The October 6 Pacific product listed expiration before onset. The October 7 morning Bering products listed expiration at 3:30 p.m. AKDT and an end at 5 p.m. These fields belong to older products and should not be used as a current warning schedule. ^{3 4 5}

The named areas establish the general geography, not precise offshore limits. A broader Aleutian coastal forecast describes waters up to 100 nautical miles out, but that does not establish either warning’s particular reach. ⁷

For vessel operators, the practical conclusion is narrower—and more useful—than declaring the storm over at a particular hour. Even if the warnings end as scheduled, the issued Thursday forecasts still contain 50-knot winds and 31- to 32-foot seas. The headline deadline is not an all-clear. ^{1 2}

NWS Anchorage alerts: October 7, 3:08 p.m. AKDT, Bering Side ¹; simultaneous Pacific Side warning ²; October 7, 7:22 a.m. Bering Side warning ³; October 7, 2:58 a.m. Bering Side warning ⁴; October 6, 3:08 p.m. Pacific Side warning ⁵.

NWS and NOAA marine guidance: Explanation of Advisories/Warnings ⁶; Anchorage WWA Summary ⁷; Marine Definitions ⁸; Marine Weather Message directive ⁹; marine forecast directive ¹⁰; Warning/Advisory Criteria ¹¹; About NWS Forecast Parameters, Weather Types and Hazards ¹²; Marine Weather Warnings ¹³; Forecast Terms ¹⁴; marine services directive ¹⁵.

Secondary warning records: AreaZine, Kiska-to-Attu Pacific Side Storm Warning ¹⁶; Global Incident Tracker, October 7 Bering Side warning ¹⁷; NWS coastal forecast for PKZ782 ¹⁸; RecallRadarUSA, October 7 Kiska-to-Attu warning ¹⁹; Global Incident Tracker, Adak-to-Kiska warning ²⁰; World Natural Disasters, October 7 storm-warning record ²¹ and hurricane-force warning record ²²; Global Incident Tracker, October 6 Bering Side ²³ and Pacific Side records ²⁴.

Warning definitions: NWS Hurricane Force Wind Warning glossary ²⁵; New York definitions ²⁶; Wilmington criteria ²⁷; Baltimore/Washington definitions ²⁸; Wikipedia, Hurricane force wind warning ²⁹; NWS hurricane glossary ³⁰; Spokane definitions ³¹.

Alert documentation and discussions: NOAA CAP Documentation ³²; weather-gov/api discussion 385 ³³; NWS CAP User Training ³⁴; discussion 762 ³⁵; Alerts Web Service ³⁶; discussion 719 ³⁷; API Web Service documentation ³⁸; NWS CAP Blocks and Elements ³⁹; About NWS CAP ⁴⁰; API Web Service ⁴¹.

Time-zone references: Timeanddate, Alaska time zones ⁴², AKDT definition ⁴³ and Anchorage clock changes ⁴⁴; U.S. Naval Observatory, U.S. Time Zones ⁴⁵; UTC-to-AKDT converter ⁴⁶; CalendarHours, Alaska Time Zone ⁴⁷; Timeanddate.us.com, Alaska Time Zone ⁴⁸; Timezone.Day, Anchorage ⁴⁹; Timezone.io, AKDT ⁵⁰; WorldTimeAndWeather, Anchorage ⁵¹.

Additional API references: weather-gov/api discussion 201 ⁵² and discussion 814 ⁵³; General FAQs ⁵⁴; OpenAPI copy, gist 9c399d8df0563bc94ea62861e07c4664 ⁵⁵; APIs.io, Weather.gov Alerts API ⁵⁶; NWS API Web Service ⁵⁷.