Dense Fog — Debeque To Silt Corridor, Colorado

2025-10-10 to 2025-10-11 · Debeque To Silt Corridor, Colorado

Event narrative

Widespread fog developed within lower valleys along I-70 resulting from heavy rainfall on October 10 and 11. The KRIL ASOS at the Rifle Garfield County Airport reported sustained periods of reduced visibility from mist and fog beginning early in the morning on the 10th and persisting into the late morning on the 11th. The KRIL ASOS would report two brief periods of dense fog reducing visibility to 1/4 mile during the night. No reports of injuries, damages, or fatalities were received.

Wider weather episode

Remnants of Tropical Storm Priscilla brought record-breaking moisture and widespread precipitation to western Colorado on October 10th and 11th. Portions of the region saturated under heavy rainfall with many locations experiencing periodic drops in visibility due to mist beginning early in the morning on the 10th and persisting into the early afternoon on the 11th. Dense fog was also able to develop overnight across the Grand Valley and in lower valleys along the I-70 corridor.

Source: NOAA Storm Events Database, event_id 1298338. Narrative written by the NWS forecast office that issued the report.