Ice balls, that is. The ice balls, ranging from the size of baseballs to large yoga balls, covered the Michigan lakeshore, Mulligan said. Ice balls form when turbulent water near the shore breaks up a layer of slushy ice, according to CNN WeatherThe National Weather Service in Grand Rapids said Friday that it "finally got cold enough" for the ice balls to form on Lake Michigan. Because of this year's abnormally warm weather, the ice balls were late to the party. The ice balls are attracting lots of attention from local residents.

Source: CNN February 16, 2020 18:22 UTC