Dense fog advisory for Northern Colorado until Wednesday morning – roads could be hazardous

Published Oct 15, 2025

On Wednesday at 1:42 a.m. the National Weather Service issued a dense fog advisory in effect until 9 a.m. for Larimer County below 6,000 feet/Northwest Weld County, Northeast Weld County and Central and South Weld County as well as Logan County.

The NWS states to prepare for, “Visibility as low as 100 yards in dense fog.”

“Areas of low visibility will make driving conditions hazardous. This will impact I-25 from Loveland north to Wyoming, US 85 north of Greeley, and highway 14 between Fort Collins and Sterling,” says the NWS. “If driving, slow down, use your headlights, and leave plenty of distance ahead of you.”

Navigating fog: Safety tips by the NWS

If a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility often drops to just a quarter-mile or less. These conditions can make driving challenging, so exercise extreme caution on the road, and if possible, consider delaying your trip.

If you must venture out in foggy conditions, keep these safety tips from the NWS in mind:

Reduce speed:

Slow down and allocate extra travel time to reach your destination safely.

Visibility matters:

Ensure your vehicle is visible to others by using low-beam headlights, which also activate your taillights. If you have fog lights, use them.

Avoid high-beams:

Refrain from using high-beam headlights, as they create glare that impairs your visibility on the road.

Keep your distance:

Maintain a generous following distance to account for abrupt stops or shifting traffic patterns.

Stay in your lane:

To ensure you are staying in the correct lane, use the road’s lane markings as a guide.

Zero visibility protocol:

In situations of near-zero visibility due to dense fog, activate your hazard lights and seek a secure location, such as a nearby business’s parking lot, to pull over and come to a stop.

No parking options:

If no parking area is available, pull your vehicle as far to the roadside as possible. Once stationary, turn off all lights except the hazard flashers, engage the emergency brake, and release the brake pedal to ensure your tail lights are not illuminated, reducing the risk of other drivers colliding with your stationary vehicle.

By adhering to these recommendations from the NWS, you can navigate foggy conditions more safely, reducing the risk of accidents and ensuring your well-being.

Source: The National Weather Service