Give yourself plenty to time to get to work Monday: The National Weather Service has issued a dense fog advisory that warns visibility could be less than one-fourth mile in northern Utah.

The advisory is in effect until 8 a.m. Monday but the weather service said the fog could stay in place through the afternoon.

The affected locations include the northern Wasatch Front and the Salt Lake and Tooele valleys. Dense fog will impact Interstate 15 in Salt Lake, Davis, Weber and Box Elder counties; Interstate 80 from Salt Lake City to the Great Salt Lake Desert; and Legacy Parkway, according to the advisory.

Drivers are urged to increase distances between vehicles, use low beams and reduce speeds.

The fog did not appear to be causing increased collisions on the freeways Sunday. As of early evening, there had not been an uptick in reported crashes, according to the Utah Highway Patrol.

However, the fog was affecting Salt Lake City International Airport on Sunday, with 23 inbound flights diverted to Provo and St. George, as well as airports in surrounding states. In addition, 30 outbound and 25 inbound Sunday evening and Monday morning flights were canceled.

Delays at the Salt Lake City Airport were averaging in excess of 90 minutes Sunday evening so passengers should check with their airline for potential impacts.



About 20 incoming flights to @SLCAirport have been diverted so far due to low visibility caused by the fog. Passengers should check with their airline for possible flight delays. — SaltLakeCityAirport (@slcairport) January 8, 2018

On Monday morning, at least four outbound flights and seven inbound flights had been canceled due to low visibility from the fog, airport representatives said.