The National Weather Service is trying to catagorize the tornadoes that ripped through southern Minnesota yesterday. University of Minnesota Climatologist Mark Seeley says it's likely the tornadoes were what are called "F-Three," which means winds of 150 to 200 miles per hour: Seeley answers weather questions every Friday morning at 6:50 on Minnesota Public Radio's "Morning Edition." Sun 28-MAY 11:52:12 MPR NewsPro Archive - Wed 04/11/2001