BZ 121317 Inversion 01

Haze and fog blankets downtown Ogden as a winter inversion covers the Wasatch Front on Wednesday, Dec. 13, 2017.

SALT LAKE CITY — Air quality improved slightly for some areas of Northern Utah after a weak front moved through the area Thursday evening, but inversion conditions will continue for at least one more day this week.

The National Weather Service Forecast Office in Salt Lake City said to expect inversion conditions, including patchy fog, urban haze and poor air quality, to continue in Northern Utah until Friday. 

A storm system is expected to come through the area Saturday, which will clear things up in the valley. The storm is expected to bring snow to the mountains and some light accumulations in the valleys, the weather service said. At least 1 inch of snow is possible in Ogden, according to the service’s forecast.

Relief from the haze will be short-lived, however, as the weather service expects inversion conditions to develop again early next week. However, it shouldn’t be as strong or long-lasting as the past week. 

“Another cold Pacific system is expected to impact Utah Wednesday bringing much colder temperatures and the potential for accumulating snow,” the service said in its hazardous weather outlook statement

Air quality in Weber County hit moderate levels Thursday, while it remained unhealthy for sensitive groups in Box Elder and Davis counties, according to the Utah Department of Environmental Quality

During this time, people with lung disease, children and older adults, and people who are active outdoors are particularly vulnerable. People in these groups should reduce prolonged or heavy outdoor exertion.

Air will become unhealthy for sensitive groups in all three counties Friday before settling back to moderate on Saturday, according to the department’s forecast. A mandatory no-burn action is in effect both days. 

People are asked to not use solid fuel burning devices, reduce or stop open-burning and reduce vehicle use by consolidating trips. Industries are urged to optimize operating conditions to minimize air pollution emissions.

Reach digital producer Jessica Kokesh at 801-625-4229 or You can also follow her on Twitter at @JessicaKokesh or

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