Complex sentence: Meanwhile, WLMT began broadcasting The CW on September 18 and the station serves as the default over-the-air affiliate for Jackson since The WB 100 + outlet "WBJK" joined The CW Plus and is seen exclusively on cable.
Split into simpler sentences: Meanwhile, WLMT began broadcasting The CW on September 18. As a result, that station serves as the default over-the-air CW affiliate for Jackson since The WB 100 + outlet "WBJK" joined The CW Plus and is seen exclusively on cable.