Tornado Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
10 % 14,000 177,676 Aberdeen, SD...Watertown, SD...Brookings, SD...Huron, SD...Madison, SD...
5 % 42,798 609,011 Sioux Falls, SD...Mitchell, SD...Pierre, SD...Yankton, SD...Marshall, MN...
2 % 61,005 1,298,561 Fargo, ND...Sioux City, IA...Moorhead, MN...Norfolk, NE...Columbus, NE...