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Dense Fog in Central Yampa River Basin, Colorado

Dense Fog March 4, 2026 · Central Yampa River Basin, Colorado

What the National Weather Service wrote

Widespread dense fog developed within the Yampa River Basin during the morning of March 4. The KCAG ASOS at the Craig-Moffat County Airport reported several hours of reduced visibility below 1/4 mile resulting from freezing fog which lasted until a couple hours beyond sunrise. No reports of injuries, damages, or fatalities were received.

The wider storm

A low pressure system passed through the Intermountain West overnight on March 2, bringing with it showers of rain to northwestern Colorado. Moisture pooled within valleys and lingered into the morning of March 4, at which point a transient ridge moved overhead, clearing skies and calming winds. This prompted dense fog to develop within the Yampa River Basin which persisted beyond sunrise.

Source: NOAA Storm Events Database, event 1321998. Narratives are written by the National Weather Service forecast office that issued the report.

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