Smoke from wildfires across northern Saskatchewan was getting caught up in the flow around low pressure over Ontario. This airflow was directing the smoke plume southeastward into Minnesota and Wisconsin. This was producing a hazy sky across the area with even a faint smokey smell noted at the National Weather Service Office atop the La Crosse Ridge.
Below is a Visible Satellite Loop from Saturday morning through Saturday afternoon July 26th. Note the plume of smoke from northern Saskatchewan into Minnesota and Wisconsin.