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DARLINGTON, S.C. -- With inclement weather expected to reach Darlington Raceway, all of Friday's on-track activity has been postponed by NASCAR.

Saturday's first practice will be held from 11 a.m. to 12:25 p.m. and final practice will be from 1:30 p.m. to 2:50 p.m.

The scheduled qualifying session at 1:45 p.m. on Saturday has been canceled.

The Southern 500 is scheduled for 6 p.m. on Sunday and will be broadcast on NBC.