WINONA, Minn. – With a messy, mushy storm forecast for Wednesday, many school districts in southern Minnesota cancelled classes.  Overnight rain was expected to turn into snow about dawn and accumulate at an inch an hour. For Winona the National Weather predicted two to seven inches total. As much as nine inches was expected elsewhere in a band stretching from north central Iowa northeast into Wisconsin. Gusts of 45 to 55 mph could generate blizzardy conditions. The storm wasn’t expected to last more than a day. A second snow, however, was en route Sunday, forecasters said.