Winter Storm — Northeastern Yellowstone, Montana

2020-10-17 to 2020-10-19 · Northeastern Yellowstone, Montana

Event narrative

Snowfall around 11 inches occurred across the area.

Wider weather episode

An early season arctic airmass arrived into the Billings Forecast Area during the 3rd week of the month. At the same time, a very strong upper level disturbance within an unstable northwest flow aloft was situated over south central Montana and northern Wyoming. The combination of these factors brought heavy, wet snow to a large portion of the forecast area.

Source: NOAA Storm Events Database, event_id 920674. Narrative written by the NWS forecast office that issued the report.