Whiteout Conditions Trigger Multicar Pileups, Crashes Across South Dakota, Nebraska, Minnesota The Weather Channel 12/23/2020 Jan Wesner Childs Replay Video UP NEXT Numerous crashes, multi-vehicle pileups and road closures were reported across South Dakota, Nebraska and Minnesota Wednesday as a winter storm brought in blowing snow, slippery roads and treacherous driving conditions across the region. Some 20 cars and trucks slammed into each other in a multi-vehicle pileup on Interstate 29 in eastern South Dakota Wednesday afternoon. The incident happened about one mile north of the Dell Rapids exit and shut down the northbound lanes of the interstate, Tony Mangan, public information officer for the South Dakota Department of Public Safety, told weather.com.