Dense Fog — Debeque To Silt Corridor, Colorado

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

Event narrative

Areas of fog developed within lower valleys along I-70 resulting from heavy rainfall on over the previous days. The KRIL ASOS at the Rifle Garfield County Airport reported sustained periods of reduced visibility from mist and fog throughout the night of the 11th and 12th. The KRIL ASOS would report a brief period of dense fog reducing visibility to less than 1/4 mile during the night. No reports of injuries, damages, or fatalities were received.

Wider weather episode

Anomalous moisture from Tropical Storm Priscilla remained across much of the western CONUS on the 11th, though drying mid-level air paved the way for clearing skies in the late afternoon. These clearer skies paired with a passing cold front lead to greatly cooler overnight lows. Widespread fog and mist developed across the region's valleys as a result, including dense fog along portions of the I-70 corridor.

Source: NOAA Storm Events Database, event_id 1298359. Narrative written by the NWS forecast office that issued the report.