Noise monitoring program

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.

Monday, April 22 - Sunday, April 28, 2024


Good to Moderate levels.

Particle pollution (PM2.5)

Good to Moderate levels.

Short-Term Forecast Maps:

Forecast AQI maps for the short-term forecast period.

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)

Good AQI PM2.5 and ozone are forecast through the short-term period. High-pressure to the southeast will partner with an incoming low-pressure system to generate breezy southwesterly winds, low humidity, and above normal temperatures on Monday. We should see a decent amount of sun as well before cloud and precipitation chances begin to increase from the west-to-east this afternoon ahead of an initial cold front. On Tuesday, we should start mostly dry before a secondary cold front dropping in from the north leads to increasing precipitation chances with a few thunderstorms possible. Winds will be out of the north behind this front leading to cooler temperatures as a fresh high-pressure air mass settles over the region on Wednesday.

Extended Outlook (Days 4-7)

High-pressure looks to slowly drift east on Thursday and Friday as a robust low-pressure system begins to develop over the Plains. We should stay mostly dry on Thursday under mostly sunny skies accompanied by steady southeasterly winds. These winds will then become quite blustery on Friday and Saturday as the system moves into Great Lakes Region. Currently, widespread precipitation chances with scattered storms look likely Friday, diminishing through the day on Saturday as the system exits east. Models then suggest another round of precipitation will move through Sunday into Monday as another system moves over the region. Mostly Good AQI PM2.5 and ozone are forecast through the extended period with the best chance for Moderate AQI Thursday before the pattern becomes much more active through the remainder of the 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].