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Michigan Air Quality

Grand Rapids is the worst air in Michigan right now at an index of 48, which is Good, from fine particles (PM2.5). AirNow carries 14 reporting areas in the state. No air quality alert is in force.

Reporting areas: 14
Worst index now: 48
Alerts in force: 0
Towns under smoke: Unavailable

Radar

Reflectivity now over Michigan. Open it to see the particulate forecast on the map.

Open the live radar with the particulate forecast

Radar mosaic and map layers from NOAA MRMS and NOAA National Air Quality Forecast Capability. Boundaries from the Iowa Environmental Mesonet.

Alerts in force

An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.

None are in force in Michigan right now. All Michigan warnings.

By city, now and the days ahead14

Every AirNow reporting area in Michigan: what its monitors measured this hour, and what the state or local agency that forecasts for it expects today and tomorrow. Each area links to the nearest town’s page.

Reporting area	Now	Category now	Today	Tomorrow	Pollutant
Grand Rapids	48	Good	Good	Good	PM2.5
Jackson	32	Good	Good	Good	PM2.5
Mt Pleasant	32	Good	Good	Good	PM2.5
Northcentral-Northeast Lower	32	Good	Good	Good	PM2.5
Flint	31	Good	Good	Good	PM2.5
Bay Area-Thumb Area	29	Good	Good	Good	PM2.5
Southeast	29	Good	Good	Good	PM2.5
Lansing	21	Good	Good	Good	PM2.5
Northwest Lower	20	Good	Good	Good	PM2.5
Eastern Upper Peninsula	17	Good	Good	Good	Ozone
Kalamazoo	16	Good	Good	Good	PM2.5
Western Upper Peninsula	16	Good	Good	Good	PM2.5
Ludington	13	Good	Good	Good	Ozone
Southwest	7	Good	Good	Good	Ozone

The forecaster’s discussion

Written by Michigan Department of Environment, Great Lakes, and Energy for Grand Rapids and filed with AirNow.

Friday will likely be our lone dry day, following a mostly cloudy, drizzly work week and what looks to be a fairly wet weekend. The quasi-stationary front, to our south, which was responsible for most of the week’s gloomy weather, has been pushed further south, which will allow us to dry out during Friday. That dry period will be short-lived, however, as low pressure lifts into the Midwest, overnight. This will usher in an area of fairly widespread rain for Saturday. Additional showers are likely Saturday night into Sunday. High pressure builds back into northern Ontario during Sunday providing a shot of dry air that should discourage any lingering showers later in the day. Cool and mostly cloudy conditions should carry over into the early week as the stalled front remains active over the Ohio Valley. As for Air Quality, I expect ozone to remain the Good range, which is enforced by the lower sun angle, shorter days and cooler nights. Fine Particulates should also be mostly Good with a few scattered Moderates. EXTENDED FORECAST: Air Quality is expected to remain mostly Good to begin the upcoming work week.

Smoke

NOAA’s Hazard Mapping System smoke analysis could not be read just now.

Smoke on the radar over Michigan

What this means

The index runs from 0 to 500. Good is 0 to 50, Moderate to 100, Unhealthy for Sensitive Groups to 150, Unhealthy to 200, Very Unhealthy to 300, and Hazardous above that. The figure reported for a place is the highest index among the pollutants measured there, and the pollutant that produced it is named beside it.

What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.

Towns

Air quality for any town in Michigan: what is measured nearby, the category forecast for today and tomorrow, and NOAA’s model hour by hour. Largest first.

244 smaller towns

Smaller places have pages too; search for one on the air quality landing page.

Sources

Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.