Dense Fog in Animas River Basin, Colorado

Dense Fog November 24, 2025 · Animas River Basin, Colorado

What the National Weather Service wrote

Widespread dense fog developed within the Animas River Basin near and just after sunrise on November 24. The KDRO ASOS at the Durango-La Plata County Airport reported multiple hours of 1/4-mile visibility due to freezing fog, and multiple periods up to 30 minutes long of visibility reduced to less that 1/4 mile. No reports of injuries, damages, or fatalities were received.

The wider storm

A shortwave trough brought rain and snowfall to the San Juan mountains on November 23. Overnight, the trough moved out of the region. A weak pressure gradient made for calmer winds, and a drying mid-level atmosphere cleared skies. With the recent precipitation though, low-level moisture remained pooled over southwestern Colorado leading to the development of widespread dense fog.

Source: NOAA Storm Events Database, event 1300441. Narratives are written by the National Weather Service forecast office that issued the report.

Tornadoes near your address

See every tornado that passed near a place you know, measured to its path.