Iowa: Adair, Adams, Appanoose, Audubon, Boone, Butler, Bremer, Buchanan, Cerro Gordo, Chickasaw, Clarke, Dallas, Davis, Decatur, Fayette, Floyd, Franklin, Green, Grundy, Guthrie, Hardin, Howard, Jasper, Jefferson, Keokuk, Lucas, Madison, Mahaska, Marion, Marshall, Monroe, Polk, Poweshiek, Ringgold, Story, Taylor, Union, Van Buren, Wapello, Warren, Wayne, and Winneshiek Counties
Minnesota: the entire state of Minnesota
North Dakota: the entire state of North Dakota
South Dakota: Aurora, Beadle, Bon Homme, Brookings, Brown, Brule, Buffalo, Campbell, Charles Mix, Clark, Clay, Codrington, Davison, Day, Deuel, Douglas, Edmunds, Faulk, Grant, Hamlin, Hand, Hanson, Hutchinson, Hyde, Jerauld, Kingsbury, Lake, Lincoln, Marshall, McCook, McPherson, Miner, Minnehaha, Moody, Potter, Roberts, Sanborn, Spink, Sully, Turner, Walworth, and Yankton Counties
Wisconsin: Ashland, Bayfield, Barron, Buffalo, Burnett, Douglas, Iron, Pepin, Pierce, Polk, Rusk, Saint Croix, Sawyer, Trempealeau, and Washburn Counties
