Flood in Dalton Highway Summits, Alaska

Flood August 26, 2025 · Dalton Highway Summits, Alaska

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Water over the Dalton Highway caused the road to wash out between mile markers 142 and 144 just north of Prospect Creek. The Alaska DOT was forced to completely close the roadway between mile markers 112 and 156. All traffic was stopped at the Jim River DOT Camp.

The wider storm

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.

Began near Prospect Creek (66.5587, -150.9678).

Source: NOAA Storm Events Database, event 1293373. Narratives are written by the National Weather Service forecast office that issued the report.

Tornadoes near your address

See every tornado that passed near a place you know, measured to its path.