* WHAT…The PM2.5 AQI is expected to reach the Unhealthy for
Sensitive Groups level.
* WHERE…All of central, east-central, north-central, and
northeast Wisconsin.
* WHEN…6 am Friday, May 30 until 6 am Saturday, May 31
* ADDITIONAL DETAILS…Air quality will degrade from north to
south on Friday as Canadian wildfire smoke pushes in ahead of a
cold front. Unhealthy for Sensitive Groups (USG) AQI (Orange
category) is expected for much of the state, with the potential
to reach Unhealthy AQI (Red category). Areas to the southwest
(mostly along the Mississippi River valley) will have the best
chance to remain in Moderate AQI on Friday. The front will move
into northeast Wisconsin Friday evening and begin clearing the
air from northeast to southwest. However, this will also push
smoke further south and west, and an additional Air Quality
Advisory may be needed on Saturday for western areas if PM2.5
concentrations remain high enough.