Central and northern Wisconsin are under an air quality advisory due to Canadian wildfire smoke

Central and northern Wisconsin are under an air quality advisory due to Canadian wildfire smoke, according to the National Weather Service in Sullivan.

In those portions of the state, people can see smoke in the sky, and in some areas, on ground level, said Mark Gehring, NWS meteorologist.

Visibilities are ranging from 4 to 7 miles in parts of west central and northern Wisconsin, as well as southern Minnesota, Gehring said.

"That's from the smoke from the Canadian fires that flared back up now that spring has come," he said. "And, those fires are kind of on the border of British Columbia and Alberta — the northern part of those provinces, so way up in northwest Canada."

"People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion; everyone else should reduce prolonged or heavy exertion," the advisory said.

The smoke could cause breathing issues for sensitive groups, Gehring explained. He recommended that sensitive groups in the effected areas should stay indoors as much as possible with their windows closed and limit time outside.

"Even for healthy people, if the concentrations get severe, you could have some effects from it," he said.

While the advisory — which began Sunday afternoon — is set to expire at 10 a.m., Gehring anticipates that another will be issued. The state's Department of Natural Resources will make that call after reassessing the situation.

With the smoke "really slowing down as it approaches southern Wisconsin," Gehring didn't expect it to reach the Milwaukee area Monday.

"Maybe a little bit tomorrow, but it may be just an upper atmosphere, too," he said. "If it stays in the mid or upper levels of the atmosphere, then nobody's effected by it. You'll still see it in the sky, but it won't effect ground level. That's when there's a bigger problem."

This article originally appeared on Milwaukee Journal Sentinel: Canadian wildfires: Central, northern Wisconsin air quality advisory