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© Jenny PearsallA waterspout near Charlevoix on Thursday, Sept. 10, 2015.
A waterspout outbreak over northern Lake Michigan on Thursday, Sept. 10, showed the wonder of these Great Lakes spectacles.

One waterspout was seen by many off the coast of Charlevoix, as this video shows.

A second waterspout formed near Leland.

The main reason for the waterspouts is cool air aloft over the warmer water of the Great Lakes.

Waterspouts should get more numerous Saturday and Sunday, as even colder air aloft moves over the Great Lakes.