The National Weather Service says the storm is taking shape
Friday over the Rocky Mountains and should start producing snow
late Friday in northern Nebraska and Iowa, southeastern South
Dakota and southwestern Minnesota. It's forecast to spread east
into Minnesota's Twin Cities and western Wisconsin by Saturday.
A swath from just west of the Twin Cities eastward into western
Wisconsin is expected to get the most snow. It also could bring
snow to northern Illinois and Indiana, southern Michigan and across
the Great Lakes region.
Temperatures in some places are expected to plunge into double
digits below zero by Sunday.