Heavy Rain in Ravalli County, Montana

Heavy Rain February 9, 2017 · Ravalli County, Montana

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

What the National Weather Service wrote

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.

The wider storm

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.

Began near Florence (46.6361, -114.1112).

Source: NOAA Storm Events Database, event 682531. Narratives are written by the National Weather Service forecast office that issued the report.

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