According to the Minnesota Pollution Control Agency, air quality is not expected to be substantially affected by smoke from the Canadian wildfires on Friday, but hot sunshine will result in higher ozone levels, causing air quality to be “moderate” on Friday.
On Saturday, northerly winds will develop as a cold front moves through southern Minnesota, bringing smoke from Canadian wildfires into Minneapolis-St. Paul. These conditions will yield “moderate” levels of pollution [but not higher warnings such as “Unhealthy for most groups”].
On Sunday night, light winds will reduce pollutant dispersion, but sunny, warm conditions will again enhance ozone formation, causing pollution levels to remain “moderate.”
By Monday and Tuesday, moderate east-southeasterly winds will develop ahead of an approaching low-pressure system, dispersing pollutants. Therefore, air-quality levels will be “good” on both days.