The highest AQ index in Michigan (as of 10:00 EDT) is currently the Flint area. Particle Pollution (PM2.5) is measuring at 66 (Moderate). This means air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Over the next few days, the highest Ozone (OZONE) will be in the Ann Arbor area. It is forecasted to be Good, meaning air quality is satisfactory, and air pollution poses little or no risk.
FORECAST DISCUSSION: Meteorological summer is on the horizon as June 1st kicks off the next work week. With the change in seasons approaching, Mother Nature has flipped a switch over the Great Lakes, going from wet and cooler conditions to warm and clear skies in a matter of weeks. An omega block pattern has set up in the Midwest which has High-pressure influencing our weather for the better part of a week or longer. Sunshine and even more sunshine is expected over the coming days to potentially a week and a half due to this atmospheric set up. Going more in depth, an omega block is when a High-pressure system sets up with two Low-pressure systems on either side of the High. This forces the jet stream to form a shape that looks like the Greek letter ‘omega’, hence the name omega block. This then forces weather systems around the High-pressure, providing clear conditions for those under the High. Once a system like this forms, it typically hangs around for multiple days or even weeks. This is the reason for clear skies, light winds and temperatures in the 70s across Michigan this upcoming weekend and into next week. For air quality, with the current weather regime in place, wind direction will predominantly be northwesterly to northeasterly this weekend which will provide cleaner air. However, since we will be in the same airmass for numerous days, pollutant buildup may occur so our eyes will be watching both PM2.5 and Ozone concentrations this weekend and into next week. As of now, PM2.5 and Ozone concentrations are expected to remain in the Good to Moderate range, but if any conditions warrant an update to this forecast, an update will be made. EXTENDED FORECAST: Clear skies and warm temperatures remain throughout the next week. Air quality will be in the Good to Moderate range to start, but with temperatures increasing mid-to-late next week, Ozone may become an issue.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 25 minutes ago
Below is a list of counties in Michigan. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.