Current air quality outlook

Department meteorologists use monitoring data and weather forecast models to predict Wisconsin's future air quality using the Air Quality Index (AQI) [exit DNR]. If warranted, an Air Quality Notice is issued. Below is the latest air quality forecast for Wisconsin.

Monday, September 16 - Wednesday, September 18, 2019

Ozone

Good to Moderate levels.

Particle pollution (PM_2.5)

Good to Low Moderate levels.

Weather outlook

Monday - We've got dense fog to start off the workweek, which should work to burn off by around 10am. Otherwise, high pressure to our northeast allows for dry conditions to win out, with more southeasterly winds to the west and light easterly winds near the lake keeping much cooler temperatures there. AQI is forecast to remain Good.

Weather map for Monday, September 16, 2019. Graphic is courtesy of the NOAA/NWS Weather Prediction Center.

Tuesday - Winds look to turn more SSE as low pressure moves into the Dakotas. Warm temperatures except for along the lakeshore are expected once again, while some precipitation development will be possible in the northwest. AQI is forecast to remain in the Good range, although with some potential for buildup towards Low Moderate AQI in the southeast.

Weather map for Tuesday, September 17, 2019. Graphic is courtesy of the NOAA/NWS Weather Prediction Center.

Wednesday - Low pressure situates itself north of the state, with winds becoming more southerly throughout the day. There will be a chance to see some showers develop along a frontal boundary associated with this system, while high temperatures look to remain in the low to mid 80s. AQI will be dependent on the arrival of this front, as well as any precipitation that comes with it. Currently, mostly Good AQI is expected, while Moderate AQI remains a possibility in the SE and along the lakeshore.

Extended outlook

Southerly flow looks to be a common theme as we wrap up the workweek, allowing unseasonably high temperatures in the low to mid 80s on both Thursday and Friday. These winds will also work to bring in moisture, possibly allowing isolated storms to develop, especially in the evening through the overnight hours. Good to Low Moderate AQI is forecast for most, while the potential for Moderate conditions in the SE and along the lakeshore currently looks to continue.

Note: All weather maps are courtesy of the NOAA/NWS Weather Prediction Center [exit DNR].

Air Quality Index (AQI) ranges

For more information about AQI ranges and colors, see the U.S. EPA's Air Quality Index - A Guide to Air Quality and Your Health [exit DNR].