United States (USA) - Missouri west of approximately 93°35'W - counties of Andrew; Atchison; Barry; Barton; Bates; Buchanan; Caldwell; Cass; Cedar; Clay; Clinton; Dade; Daviess; De Kalb; Gentry; Harrison; Henry; Holt; Jackson; Jasper; Johnson; Lafayette; Lawrence; McDonald; Newton; Nodaway; Platte; Ray; St Clair; Vernon; Worth.