NEW : Gusty winds and snow created whiteout conditions across upper Midwest and Great Lakes regions . Flash floods struck north-central Alabama where rescuers ended up in a tree early Wednesday when their boat overturned as they tried to help a motorist whose car was swept into a rain-swollen creek , said the administrative assistant for Morgan County 's Emergency Management Agency . 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 . 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 .