Dense Fog in Animas River Basin, Colorado

Dense Fog November 22, 2025 · Animas River Basin, Colorado

What the National Weather Service wrote

Widespread dense fog developed within the Animas River Basin after midnight on November 22. The KDRO ASOS at the Durango-La Plata County Airport reported multiple hours of 1/4-mile visibility throughout the early morning due to freezing fog. No reports of injuries, damages, or fatalities were received.

The wider storm

With a low passing to our south, calm winds and clearing skies began to dominate the region. Though the mid-level atmosphere was quickly drying out, low-level moisture persisted in lower valleys across the western slope of the Rockies. Patchy fog was able to develop across portions of northwestern Colorado as a result, and widespread fog developed over portions of southwestern Colorado before quickly burning up after sunrise.

Source: NOAA Storm Events Database, event 1300429. Narratives are written by the National Weather Service forecast office that issued the report.

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