Flood — Beaverhead, Montana

2023-04-10 to 2023-04-13 · near Dewey, Beaverhead, Montana

Event narrative

Meagher County Sheriff's office stated rockslides were occurring in the Deep Creek Canyon area, affecting Highway 12, due to snowmelt and flooding.

Wider weather episode

Unseasonably warm temperatures occurred in the first two weeks of April, with highs near 80 degrees occurring at times. These warm temps, along with occasional rain, resulted in melting of a deep snowpack on top of frozen ground which led to significant runoff into area waterways. Moderate to major flooding occurred along portions of the Milk River and its tributaries. Impactful snowmelt flooding also occurred across Southcentral Montana, in particular across the Gallatin Valley.

View location on OpenStreetMap → (46.3556, -111.1514)

Source: NOAA Storm Events Database, event_id 1096959. Narrative written by the NWS forecast office that issued the report.