Day 1 Tornado Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
5 % 36,595 230,145 Rapid City, SD...Gillette, WY...Spearfish, SD...Rapid Valley, SD...Sturgis, SD...
2 % 126,977 1,235,536 Sioux Falls, SD...Bismarck, ND...Minot, ND...Aberdeen, SD...Watertown, SD...