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today's forecasts on AIRNow [exit DNR].
current air quality in Wisconsin.
and subscribe to air quality notices.
Contact information
For information on air quality and forecasts, contact:
Mike Majewski

Current air quality outlook

Department meteorologists use monitoring data along with weather predictions to determine when and where an air quality notice is needed. The meteorologists submit daily air quality forecasts for eight Wisconsin cities to EPA's AirNow website [exit DNR]. Below is the current air quality forecast for Wisconsin, which will be updated as needed.

Forecasts are reported using the Air Quality Index (AQI) [exit DNR]. The AQI has recently changed to reflect the new federal ozone standard. See Wisconsin Statewide Air Quality Notices for details.

Monday, November 28 - Friday, December 2, 2016

Note: Ozone monitoring season ended on October 15, 2016. Ozone forecasts will resume in late April, when the 2017 ozone season begins.

Particle pollution (PM2.5)

Good levels.

Weather outlook

PM2.5 air quality is in the Good and Moderate range throughout Wisconsin this Monday morning. Air quality will improve as winds increase ahead of a low pressure center currently situated near the border of Minnesota and the Dakotas. The approach of the low and associated cold front will bring rain showers today into tomorrow, and air quality will return to the Good range. Wisconsin will experience a dry period tomorrow into Wednesday as the Low passes overhead, followed by possible snow showers Thursday as the Low tracks northeast over the Great Lakes. Air quality will remain Good through Friday.

The surface analysis for Wednesday is shown below

Weather map for Wednesday, November 30, 2016.

Weather map for Wednesday, November 30, 2016. Graphic is courtesy of the National Weather Service.

Extended outlook

Air quality will remain Good through the weekend as the weather pattern across the Midwest becomes more zonal and High pressure builds back into the region.

Air Quality Index (AQI) ranges

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

Color coded chart showing ozone and PM2.5 concentration ranges for each AQI level
AQI Levels
of Health Concern
Numerical Value 8-hr Ozone (ppb) 24-hr PM2.5 (ug/m3)
Good 0-50 0-54 0.0 to 12.0
Moderate 51-100 55-70 12.1 to 35.4
Unhealthy for Sensitive Groups 101-150 71-85 35.5 to 55.4
Unhealthy 151-200 86-105 55.5 to 140.4
Very Unhealthy 201-300 106-200 140.5 to 210.4
Hazardous > 300 > 201 > 210.4
Last revised: Tuesday November 29 2016