Air quality will become unhealthy for some beginning Sunday through Monday morning. Canadian wildfire smoke returns which will create hazy skies as well.

KSTP FORECAST FIRST ALERT TODAY FOR TWIN CITIES/WESTERN WISCONSIN BECAUSE OF CANADIAN WILDFIRE SMOKE PRODUCING UNHEALTHY LEVELS OF SMOKE: Northwest Winds blowing over Minnesota and Wisconsin Today will bring significant amounts of Smoke from Canada Wildfires – people with Respiratory Illness should avoid long periods of time outdoors Today through Sunday morning and even Healthy

The Bay Area Air District issued an air quality advisory on Thursday due to smoke from fires in the Sacramento Valley, which is expected to drift into the region, reaching all the way to the Santa Clara Valley.