Flash Flood — Larimer, Colorado

2021-07-20 · near Rustic, Larimer, Colorado

Event narrative

A debris flow moved into Black Hollow Gulch and damaged or destroyed several structures including four homes. Four people in one of the homes perished when their residence washed away in the floodwaters.

Wider weather episode

A deadly debris flow from the Cameron Peak burn area, struck Black Hollow Gulch west of Rustic on CO-14. The debris flow, estimated to be 5 to 8 feet deep, destroyed 6 homes and other structures. Four people were killed when their residence was swept away by the floodwaters. The houses and structures were at the mouth of Black Hollow Canyon on the Poudre River. The debris consisting of small, medium, and large boulders, mud, and entire burned trees flowed down the canyon and destroyed the houses in that area, including the bridge that crossed the Poudre River.

View location on OpenStreetMap → (40.7013, -105.6496)

Source: NOAA Storm Events Database, event_id 971685. Narrative written by the NWS forecast office that issued the report.