(KRON) -- On Friday, the KRON4 News 4, 5, and 6 p.m. newscasts will be exclusively available through streaming on KRONon or by downloading the KRON4 app. You can also stream the KRONon app on your Roku, AppleTV or Amazon Firestick device. The regular broadcast newscasts on KRON4 News for those hours are being preempted by this weekend's NASCAR Xfinity Series. The series will make its CW on KRON4 debut this Friday, Sept. 20. Coverage from Bristol Motor Speedway in Tennessee begins at 4 p.m. PT with the new pre-race show "NASCAR Countdown Live" only on KRON4. The race is scheduled to begin at 4:30 p.m. The KRON4 News newscasts at 10 and 11 p.m. Friday will go ahead as normal.