As snowfall neared 4 feet in the Black Hills and winds gusting higher than 50 mph continued to howl, state officials had a simple message for anyone thinking of trying to drive in western South Dakota's blizzard: Don't. Officials closed a long stretch of Interstate 90, where dozens of vehicles were trapped. Some motorists have been stranded for more than 24 hours, Rounds said, noting that search teams can't get to them because of zero visibility.








