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Wisconsin DNR issues air quality alert as Canadian wildfire smoke expected to move back in this weekend

The haze in the distance is cause by wildfire smoke drifting south from Canada.
Katie Thoresen
The haze in the distance is cause by wildfire smoke drifting south from Canada.

Wildfire smoke originating from Canada will move into Wisconsin throughout the day Thursday.

Air quality is expected to range from the UNHEALTHY FOR SENSITIVE GROUPS (USG) level to the UNHEALTHY level.

People with heart or lung disease, older adults, and children should consider avoiding prolonged or heavy exertion and everyone else should consider reducing prolonged or heavy exertion.

The best chance for UNHEALTHY level will be across western Wisconsin on Friday as high pressure moves over the state and limits atmospheric mixing.

Over the weekend, the ozone AQI is expected to range from the USG level to the UNHEALTHY level due to favorable weather conditions alongside the presence of wildfire smoke.

On both Saturday and Sunday, mostly USG AQI ozone concentrations are expected inland of the lake breeze, while those areas within the lake breeze will have a better chance of reaching UNHEALTHY AQI ozone concentrations.

Remember, ozone concentrations are typically maximized during the afternoon or evening before decreasing overnight into the next morning.

You can monitor air quality here.

The DNR air quality advisory is in place through Monday morning.

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