Heavy snow and difficult travel expected again, heaviest snow in southern Minnesota

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Minnesota has experienced four significant blowing dust episodes over the past few years, and the uptick in frequency has raised air-quality concerns across the state. 

Now, the Minnesota Pollution Control Agency will start issuing air quality alerts for blowing dust this summer. Matt Taraldsen, MPCA meteorologist, says the fine particle pollution from dust — technically known as PM10 — is similar to wildfire smoke.    

“People are very familiar with PM2.5 or fine particle pollution and wildfire smoke,” Taraldsen said. “PM10 can get into the airways and cause inflammation and cardiopulmonary issues even in healthy people — in the right concentrations.”

Dust can travel to Minnesota from Texas or Oklahoma, and high winds can blow in dust from North and South Dakota as well. Low snowpack and dryer conditions in the Midwest have contributed to loose soil.  

“It used to be that we would get snow and it would stay on the ground relatively all winter, and that would prohibit any dust from being lofted because it’s under the snow pack,” he said. “But the past several years, with the exception of 2023, we’ve had open and bare ground for much, if not most, of the winter. So anytime you get these big storms that come in, [with] sustained winds, it can pick up the dust in concentrations enough to impact health.”

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Dust storms are more than just a nuisance weather event; the fine particles can contribute to poor air quality. MPR News chief meteorologist Paul Huttner talked to an expert about why the Minnesota Pollution Control Agency is adding blowing dust to its public-health alerts. 

Minnesota Pollution Control Agency adds ‘blowing dust’ to air quality alerts

A sign reads "Air Quality Alert, Consider Reducing Trips"

Minnesota Pollution Control Agency adds ‘blowing dust’ to air quality alerts

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