Marquette, MI – Hazy skies and unhealthy air remain a top concern across Upper Michigan through Tuesday as wildfire smoke blankets the region and a heat surge begins to take hold heading into the weekend.
According to the National Weather Service in Marquette, an Air Quality Advisory remains in effect for all of Michigan through Tuesday due to elevated fine particulate matter (PM2.5), largely driven by Canadian wildfire smoke. The advisory is especially critical for sensitive groups, including those with asthma or heart conditions.
Every monitoring site in the state is showing “Unhealthy for Sensitive Groups” levels or worse. A high-pressure system over the Midwest is trapping the smoke near the surface, with limited relief expected until a pattern shift midweek. Storm chances return by Wednesday night, potentially improving air quality but bringing new hazards with lightning and localized flooding.
Tuesday: Patchy haze and fog early, then mostly sunny with isolated storms after 4 p.m. High near 79°F.
Wednesday: Mostly sunny, high near 81°F. Smoke lingers.
Wednesday Night: 30% chance of storms late. Muggy overnight with lows in the mid-60s.
Thursday: 40% chance of thunderstorms. High near 83°F and increasing humidity.
Friday: Mostly sunny and hot, high near 89°F.
By late week, heat indices could soar above 90°F, especially Friday and Saturday, with a 40–70% chance of storms persisting through the weekend. Residents are urged to limit strenuous outdoor activity, keep indoor air filtered, and stay alert for new weather advisories.
