Heavy Rain — Ravalli, Montana

2017-02-09 · near Florence, Ravalli, Montana

Event narrative

An NWS Employee reported extensive ponding in fields and near property in Corvallis, MT. The exceptionally high amount of valley snow-pack allowed for periods of moderate rain combined with relatively warm temperatures to cause unusually extensive areal flooding on Feb. 9 & 10.

Wider weather episode

A warm and moist southwest flow pattern set up over the Northern Rockies during the second week of February. Significant rain and warming temperatures combined with the abundant low elevation snow to cause widespread ponding and flooding in fields and on roadways. The Bitterroot Valley near Corvallis, MT saw the most widespread areal flooding. Interstate 90 was also impacted for several hours as water ponded to a depth of 3 feet in a low spot on the roadway near Saltese, MT.

View location on OpenStreetMap → (46.6361, -114.1112)

Source: NOAA Storm Events Database, event_id 682531. Narrative written by the NWS forecast office that issued the report.