Flood — Upper Kuskokwim Valley, Alaska

2022-05-10 to 2022-05-11 · near Mcgrath, Upper Kuskokwim Valley, Alaska

$301K

Property damage

Event narrative

An ice jam formed at Sand Island, adjacent to McGrath, at 5pm on May 10th . Before the ice jam, waterleaves were near bankfull, and the ice jam caused the river to rise 4.5 feet in 6 hours ' from 19.2' at 5 PMto 23.7' and 11PM. The ice jam held for 26 hours, releasing at 6pm on 5/11, with the water dropping rapidly. The flooding caused damage to Chinana Avenue, the main road in town as well as the road to the dump. The flood damaged the sewage lagoon and the dump. Water entered basements and crawlspaces of around 15 homes.

Wider weather episode

An ice jam formed at Sand Island, adjacent to McGrath, at 5pm on May 10th and held for 26 hours.

View location on OpenStreetMap → (62.9454, -155.5751)

Source: NOAA Storm Events Database, event_id 1031134. Narrative written by the NWS forecast office that issued the report.