Winter Storm — Centennial Mountains-island Park, Idaho

2021-12-29 to 2021-12-31 · Centennial Mountains-island Park, Idaho

Event narrative

Idaho Highway 47 was closed from Ashton to 2 miles north of Warm River. The COOP observer in Island Park measured 17 inches of snow through the last 3 days of the month. Extensive blowing and drifting of snow was reported.

Wider weather episode

The continued push of Pacific moisture continued into the last 3 days of the month. Periods of snow continued to the last day of December which was the 10th consecutive day with measurable snowfall in southeast Idaho. Periods of very strong winds also accompanied the snow. Roads were closed on both December 30th and 31st including interstate 84 as well as US Highway 20.

Source: NOAA Storm Events Database, event_id 1000057. Narrative written by the NWS forecast office that issued the report.