India, Dec. 28 -- A strengthening winter storm could bring dangerous blizzard conditions to parts of the Upper Midwest from Sunday, December 28, into Monday, December 29, the National Weather Service (NWS) has warned. Whiteouts, high winds, and rapidly deteriorating travel conditions are likely as a result.

Several NWS offices issued Blizzard Warnings on Saturday afternoon. They cover portions of Michigan's Upper Peninsula, central and southern Minnesota, and northern Wisconsin near Lake Superior. As many as 34 counties are on alert in these states.

Visibility could decrease to near zero in open areas due to blowing snow, which would make travel dangerous or impossible. Wind gusts as high as 45-65 mph are forecast in parts of the warned...