For the second consecutive week, the NASCAR Cup Series is feeling the effects of Mother Nature.
The Quaker State 400 is at risk of delay as rain descends upon the track at Atlanta Motor Speedway.
Sunday's forecast called for storms throughout the evening. Things seemed calm ahead of the race; rain picked up south of the track at the green flag.
But things took a turn when as the race entered its first caution. Shortly thereafter, pit crews communicated with their drivers that rain was coming within the next 60 to 90 minutes. The intensity of the racing picked up as drivers looked to position themselves out front prior to the incoming storms.
LIVE: Updates, highlights from Quaker State 400 in Atlanta
Here's the latest as yet another Cup Series race gets slick.
NASCAR at Atlanta weather updates
9:59 p.m.: NASCAR makes the call: Byron is the winner as the checkered flag is waved. The race will come to a premature ending.
9:57 p.m.: Things aren't looking to good. Could be getting a decision quite soon from NASCAR officials.
9:50 p.m.: RED FLAG! After much anticipation, rain has finally showed up at the track, leading the waving of the red flag. It's William Byron out in front as the race goes on hiatus. Will be interesting to see if NASCAR makes the call if things remain wet in the next 10-15 minutes.
9:20 p.m.: Stage 2 goes off without a hitch as Keselowski gets the win. However, it seems only a matter of time before things get wet. Drivers seem uncertain whether to stay out on pit road or make the necessary changes to their whips, as evidenced by this interaction between Keselowski and his crew chief.
8:40 p.m.: Things are still clean, but we still have to keep an eye on developments southwest of the track.
8:20 p.m.: Rain still looking like an issue as we approach the halfway point of the race, but things are still dry at Lap 80.
8 p.m.: Randall Burnett communicates to Kyle Busch that rain could be threatening the track in the next hour and a half or so. Not ideal. Expect things to get hectic as drivers fight for track position ahead of what could be a lengthy delay.