ABC news has covered this extensively. They report that although the roads are incredibly treacherous traffic seemed largely unaffected. Some people, they report emphatically, have even had to clear snow off their windshields. Apparently, there's 400 snow emergency vehicles on standby, with over 65000 tons of salt.
When I lived in northern Minnesota one winter, the weather forecasters called sort of weather No Precipitation.
p.s. Shooting up a mall is not "going out in style." It is pathetic and contemptible.