An air quality alert is in effect for all of Massachusetts as smoke from Canadian wildfires descends into the Boston area.

It's more than just winds that play a factor in how this smoke gets to our region--meteorology and atmospheric conditions play a huge role.

Wildfire smoke travels with the wind and the forecast calls for a shift in direction tonight, which will improve air quality on Sunday. However, as Canadian wildfires continue to burn, it’s more than likely this will not be our last visit from the smoky conditions this year.