WINCHESTER — The Umpqua women’s and men’s basketball teams begin their Northwest Athletic Association of Community Colleges Southern Region seasons on Saturday at home, facing Chemeketa of Salem. The Chemeketa women (7-6) play No. 7-ranked UCC (10-3) at 2 p.m., followed by the Chemeketa (7-4) and UCC men (3-8) at 4. In other league women’s openers, Mt. Hood (2-9) is at No. 1 Lane (14-0), Southwestern Oregon (7-5) at No. 3 Clackamas (10-3) and Portland (1-9) at Linn-Benton (3-9). The men’s openers are the same: Mt. Hood (4-8) at No. 1 Lane (12-2), SWOCC (5-7) at Clackamas (8-6) and Portland …