Heavy Snow — Upper Blackfoot and Macdonald Pass, Montana

2023-01-27 to 2023-01-28 · Upper Blackfoot and Macdonald Pass, Montana

Event narrative

A spotter located about 11 miles west of Helena reported an event total snowfall between 6 and 8 inches, but stated drifting and blowing of snow made a precise measurement difficult.

Wider weather episode

A long duration winter storm event occurred from roughly January 26 through January 28th as a powerful storm system affected much of the western United States. Periods of snow, heavy at times (especially across the mountains) occurred. Event total snow amounts of 5 to 10 inches across area valleys and the Plains were common with upwards of 2 feet of snow falling across portions of area mountains. The snow was followed by a seasonably strong arctic outbreak. Southwest Montana felt the brunt of the arctic airmass with several locations experiencing wind chill values of -40 F or colder (isolated areas having wind chill values of -50 F to -60 F), with isolated locations reaching actual air temperatures of -40 F.

Source: NOAA Storm Events Database, event_id 1074350. Narrative written by the NWS forecast office that issued the report.