Dense Fog in Grand Valley, Colorado

Patchy dense fog developed through the morning of November 27th across the Grand Valley, mainly west of Grand Junction and into eastern Utah along I-70. The KGJT ASOS at the Grand Junction Regional Airport reported visibility of 1/4 mile during this event. Additionally, Colorado Department of Transportation cameras along I-70 showed areas of dense fog with less than a 1/4 mile visibility in areas around the Rabbit Valley exit, and satellite imagery in combination with Utah Department of Transportation cameras indicated areas of dense fog stretched as far west at Cisco, UT. No reports of damages or injuries were received in conjunction with this fog event.

A strong, moist winter storm had moved through eastern Utah and western Colorado in the days prior to this dense fog event. Accumulating snow had made it down the floor of the Grand Valley, particularly in areas west of Fruita toward the Utah border. With warm air advection aloft and moisture and cold surface temperatures, the development of dense fog was favored on the morning of the 27th.