Wild­fire smoke affect­ed air qual­i­ty across Col­orado Sun­day, with much of the state see­ing mod­er­ate-to-heavy lev­els of smoke from four major fires.

The Col­orado Depart­ment of Pub­lic Health and Envi­ron­ment issued an air qual­i­ty advi­so­ry for north­ern and cen­tral Col­orado Sun­day, warn­ing that smoke could make res­i­dents sick and those with res­pi­ra­to­ry con­di­tions should stay inside.

Winds are expect­ed to shift Sun­day evening to blow toward the east, like­ly bring­ing peri­ods of mod­er­ate-to-heavy smoke to the areas to the south and east of the Cameron Peak and Williams Fork fires. The Cameron Peak fire is burn­ing in Larimer Coun­ty and the Williams Fork fire is burn­ing about 15 miles south­west of Fraser.

Pro­jec­tions from the Nation­al Weath­er Ser­vice at Boul­der pre­dict the major­i­ty of the Front Range will expe­ri­ence heavy smoke Sun­day night, grad­u­al­ly easy overnight and into Mon­day morning.

Mon­day will see heavy smoke around Grand Junc­tion, Rifle, Aspen, Steam­boat Springs and Vail, accord­ing to the weath­er service.

Cur­rent smoke fore­cast from 6 pm this evening through 6 pm Mon­day. #cowx #Cameron­Peak­Fire #Williams­Fork­Fire pic.twitter.com/cVsSNd2lfu

— NWS Boul­der (@NWSBoulder) August 16, 2020