Debris Flow — San Juan, Colorado

2021-07-21 · near Eureka, San Juan, Colorado

Event narrative

A significant debris flow of mud, rocks and branches occurred on Cinnamon Pass in the San Juan Mountains. The exact time of the slide is unknown.

Wider weather episode

A subtle pulse of monsoon moisture worked its way northward across western Colorado. This, paired with the already present abundance of moisture, resulted in scattered showers and thunderstorms across the region. The stronger storms produced heavy rain, some of which led to localized debris flows in Pitkin and San Juan counties.

View location on OpenStreetMap → (37.9340, -107.5380)

Source: NOAA Storm Events Database, event_id 965681. Narrative written by the NWS forecast office that issued the report.