Heavy Snow — Gallatin and Madison County Mountains and Centennial Mountains, Montana

2023-04-18 to 2023-04-19 · Gallatin and Madison County Mountains and Centennial Mountains, Montana

Event narrative

Multiple Snotel sites in the zone estimated snow of 10 inches or greater. Clover Meadow snotel estimated 12 inches new snow over 14 hours ending 8 AM MDT 4/19. Black Bear snotel estimated 10 inches storm total ending 3 AM 4/19 and Shower Falls snotel estimated 8 inches storm total snow ending 9 AM 4/19.

Wider weather episode

A pair of upper lows became cut off over southern and eastern Montana extending south and east into the Dakotas and Wyoming from a negatively-tilted trough centered off the Pacific Northwest coastline. This cut-off low spun in place through Thursday the 20th. The result was for significant accumulating snow in eastern portions of North-central Montana, with additional heavy snow across much of the rest of Southwest and Central MT.

Source: NOAA Storm Events Database, event_id 1093968. Narrative written by the NWS forecast office that issued the report.