7-Day Air Quality Forecast
Department meteorologists use monitoring data and weather forecast models to predict Wisconsin's future ozone (O3) and fine particulate matter (PM2.5) air quality using the Air Quality Index (AQI) [exit DNR]. This forecast is updated two-to-three times weekly throughout the year, and when warranted, an Air Quality Advisory is issued. Below is the latest air quality forecast for Wisconsin.
Friday, August 12 - Thursday, August 18, 2022
Good to Moderate levels.
Particle pollution (PM2.5)
Good to Moderate levels.
Short-Term Forecast Maps:
The daily AQI is forecast for counties that monitor each pollutant of interest. The black dots represent the approximate location of Wisconsin's air quality monitors. Read the forecast summaries below for further geographic information.
Short-Term Forecast (Days 1-3)
Despite high-pressure hanging out over the Great Lakes Region, a low-pressure system will begin to work its way east from the Dakotas, bringing precipitation from west-to-east today through Saturday. Along with the rain, mostly cloudy skies should keep temperatures below average today, while breezy southerly flow bringing in warm and moist air tonight into Saturday will help temperatures increase ahead of the system. Good AQI is forecast today and tomorrow, but there will be a slight chance for Moderate AQI ozone to develop along the lakeshore on Saturday. By Sunday, the system will have cleared the area and partly sunny skies are forecast alongside E to NE winds and seasonably cool temperatures. Once again, Good AQI will be forecast but Moderate AQI potential will stay in place along the lakeshore, particularly from Milwaukee Co. south to the IL border.
Extended Outlook (Days 4-7)
Models are depicting a bit of blocking pattern setting up through the extended period, so confidence remains low at this time. With that said, there seems to be agreement in an area of high-pressure building to our northeast. In general, this should lead to mostly dry conditions for eastern areas while western areas will see better precipitation chances. Temperatures should stay below average at the beginning of the period, but slowly warm in the absence of rain. Similarly, Good AQI is likely to continue through the beginning of the period, but warming temperatures and a shift towards a southerly flow pattern could lead to Moderate AQI by mid-week.
Air Quality Index (AQI) ranges
For more information about AQI ranges and colors, see the U.S. EPA's Air Quality Index (AQI) Basics [exit DNR].