NEW : Gusty winds and snow created whiteout conditions across upper Midwest and Great Lakes regions . Wisconsin : About 3,000 University of Wisconsin students descend on field for snowball fight , campus officials said . Schools were also closed across Iowa and parts of Minnesota .
NEW : Gusty winds and snow created whiteout conditions across upper Midwest and Great Lakes regions . NEW : About 3,000 University of Wisconsin students descend on field for snowball fight , campus police say . Schools were also closed across Iowa and parts of Minnesota .