
Air quality is expected to reach the red AQI category in north central and northwest Minnesota, which is unhealthy for everyone.
The Minnesota Pollution Control Agency (MPCA) has issued an air quality alert for central, north central, and northwest Minnesota. The alert takes effect 8 a.m. on Monday, Sept. 2, and runs until 1 a.m. on Tuesday, Sept. 3. The affected area includes Brainerd, St. Cloud, Bemidji, International Falls, Roseau, and the tribal nations of Mille Lacs, Leech Lake, and Red Lake.
Smoke from numerous wildfires across the Saskatchewan province in Canada has been pulled into portions of northern and central Minnesota by northerly winds. High pressure will move into the region and will produce very light winds on Monday. This airmass has become stagnant and heavy ground-level smoke will linger across the northern half of the state for the remainder of the day on Monday. Air quality is expected reach the Red (Unhealthy) AQI category across north central Minnesota. Air quality will reach the Orange (Unhealthy for Sensitive Groups) AQI category for the remainder of the alert area. Winds will become southerly Monday afternoon, and will begin to push the smoke back to the north. Dispersion will improve and smoke levels will gradually decrease beginning in the afternoon. Smoke levels should drop below alert levels by 1 a.m. Tuesday
Fine particle levels are expected to reach the red air quality index (AQI) category, a level considered unhealthy for everyone, across north central and northwest Minnesota. This area includes Bemidji, Roseau, and the tribal nations of Leech Lake and Red Lake. In the red area, sensitive groups should avoid prolonged or heavy exertion and limit time spent outdoors. Everyone should limit prolonged or heavy exertion and time spent outdoors.
Fine particle levels are expected to reach the orange air quality index (AQI) category, a level considered unhealthy for sensitive groups, across central, east central, northwest, and north central Minnesota. This area includes Brainerd, St. Cloud, International Falls, and the tribal nations of Mille Lacs, Red Lake, and Leech Lake. In the orange area, sensitive groups should limit prolonged or heavy exertion and time spent outdoors.