Complex sentence: The station airs CBS programming if sister station WFOR needs to pre-empt for breaking news coverage and has been known to air Miami Dolphins games that air on CBS if the game is postponed due to weather (usually hurricanes).
Split into simpler sentences: The station airs CBS programming if WFOR needs to pre-empt for breaking news coverage. WBFS has been known to air Miami Dolphins games that air on CBS if the game is postponed due to weather (usually hurricanes).