The National Weather Service has confirmed tornado touchdowns near Tomah and Mauston, with power knocked out to more than 70-thousand customers Wednesday evening.  Damage was done to the Mile Bluff Medical Center in Mauston with trees and powerlines known down near the hospital.  In the middle of the severe storm, a crash on Interstate 90-94 closed eastbound traffic at about 4:30 p-m.  State Highway 21 was also closed to traffic in both directions by a crash.  Authorities have provided no injury reports yet.  Mauston Mayor Dennis Nielsen has declared a State of Emergency in the City of Mauston.