Flood in Copper River Basin, Alaska

Flood May 14, 2023 – May 18, 2023 · Copper River Basin, Alaska

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

What the National Weather Service wrote

Department of Transportation reported rapid snowmelt is occurring, and is causing minor flooding with water over portions of the Old Edgerton Highway near the Richardson Highway.

The wider storm

An unusually cold spring kept snowpack intact and in place over the Copper River Basin into mid May. Once temperatures started to warm, they did so quickly and rapidly melted snowpack in the basin. An additional snow event later in May repeated the process creating multiple events where snowmelt would impact Glennallen and Old Edgerton Highway from Moose Creek snowmelt, and Gulkana and Sourdough areas along the Gulkana River.

Began near Copper Center (61.8297, -145.2349).

Source: NOAA Storm Events Database, event 1104492. Narratives are written by the National Weather Service forecast office that issued the report.

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