Winter Storm — Eastern Lemhi County, Idaho

2020-02-05 to 2020-02-07 · Eastern Lemhi County, Idaho

Event narrative

There were widespread snow accumulations of 10 to 20 inches, with up to 3 feet of snow that fell at the Williams Creek Summit over a 2 day period. Schools were closed for the first time during the 2019-2020 winter.

Wider weather episode

An atmospheric river, originating from near Hawaii, rode up and over a broad high pressure ridge situated over the eastern Pacific and brought heavy snow to central Idaho. By the 8th, rising snow levels shut off snowfall at the lower elevations of central Idaho, while areas of Lemhi County continued to snow at all elevations.

Source: NOAA Storm Events Database, event_id 871248. Narrative written by the NWS forecast office that issued the report.