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, October 19 - Friday, October 23, 2020
Particle pollution (PM2.5)
Monday - High pressure overhead should keep the state mostly dry, with the best chance for some sprinkles or flurries to the south. Cool temperatures and Good AQI will continue.
Weather map for Monday, October 19, 2020. Graphic is courtesy of the NOAA/NWS Weather Prediction Center.
Tuesday - An upper-level disturbance will move into the upper-Great Lakes Region on Tuesday, bringing precipitation across the state throughout the second half of the day. The first measurable snowfall of 2+” is expected north and west, with the rain/snow line cutting from La Crosse to Iron Mountain, MI. Less precip. and of the liquid variety is anticipated south and east of this line, with heavier rains south of the IL border. Good AQI is forecast.
Weather map for Tuesday, October 20, 2020. Graphic is courtesy of the NOAA/NWS Weather Prediction Center.
Wednesday - A brief return of high pressure should lead to mostly dry conditions into Wednesday afternoon before evening rains with a few rumbles of thunder set in, spreading north into Thursday morning. The active weather pattern is anticipated to maintain Good AQI.
Rain and storms look to continue through Thursday, mostly to the north, as breezy southerly winds push a front that direction. This will lead to increasing temperatures to the south, where mostly dry conditions currently look to prevail. As we transition into Friday morning, the front will work its way back from NW to SE, bringing a line of showers and storms through the morning and early afternoon, followed by breezy NW winds into the night. Good AQI is anticipated 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].