United States (USA) - Mississippi west of approximately 89°40'W - counties of Adams; Amite; Bolivar; Carroll; Claiborne; Coahoma; Copiah; De Soto; Franklin; Grenada; Hinds; Holmes; Humphreys; Issaquena; Jefferson; Jefferson Davis; Lawrence; Leflore; Lincoln; Madison; Marion; Montgomery; Panola; Pike; Quitman; Rankin; Sharkey; Simpson; Sunflower; Tallahatchie; Tate; Tunica; Walthall; Warren; Washington; Wilkinson; Yalobusha; Yazoo.