Heavy Snow — Southern Rocky Mountain Front, Montana

2025-10-12 to 2025-10-13 · Southern Rocky Mountain Front, Montana

Event narrative

Snotel equipment at Dupuyer Creek estimated 9 inches new snow the evening of the 12th into the 13th.

Wider weather episode

Low-level northeasterly upslope flow at the surface combined with a relatively warm/moist airmass overrunning the cooler surface airmass to result in heavy snow, mostly along the Rocky Mountain Front and into Helena.

Source: NOAA Storm Events Database, event_id 1294336. Narrative written by the NWS forecast office that issued the report.