NEW : Gusty winds and snow created whiteout conditions across upper Midwest and Great Lakes regions . NEW : Passengers heading to cities in snow-bound states were left waiting . About 3,000 University of Wisconsin students descend on field for snowball fight , campus police say . Comment:
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 . Comment: