Parts of the Upper Midwest dug out from a heavy snowfall Saturday that caused more than 400 traffic accidents in Minnesota, and wintry conditions also were being blamed for a collision in northern Wisconsin that killed two people. Nearly a foot of snow had fallen in parts of the Twin Cities area by Saturday evening, downing trees and causing sporadic power outages. The storm that began late Friday night was blamed for a collision Saturday morning that killed both drivers and left a passenger hospitalized. The sheriff’s department in Wisconsin’s Bayfield County said the storm produced "rapidly deteriorating road conditions" that likely contributed to the crash.