High Wind — Delta Junction, Alaska

2025-08-28 to 2025-08-29 · Delta Junction, Alaska

Event narrative

The Fort Greely/Big Delta ASOS reported a period of strong southerly winds through Isabel pass the persisted for just over 24 hours with sustained winds of 45 to 50 mph and consistent gusts to around 70 mph. The strongest gust occurred just prior to midnight on the 28th with a reading of 75 mph. There were reports on social media indicating that several trees were downed in and around Delta Junction as well as some minor roof damage.

Wider weather episode

A prolonged period of deep moist southwesterly flow from the North Pacific ocean, otherwise known as an Atmospheric River, produced several days of heavy rainfall along the south slopes of the Brooks Range. Over about a 5 day period total rainfall of three to six inches resulted in considerable flooding for the Koyukuk and it's tributaries. In addition this southwest flow also resulted in very strong winds through the Alaska Range passes.

Source: NOAA Storm Events Database, event_id 1293183. Narrative written by the NWS forecast office that issued the report.