The FireKeepers Casino 400 at Michigan International Speedway is underway after a two-hour plus rain delay, though it remains to be seen how many laps NASCAR will be able to get in Sunday. Jeff Gluck of The Athletic provided a radar update following the waving of the green flag and warned that a day ending rain cell is approaching the racetrack. “Track looks really good. Engines re-fired early,” Gluck wrote on X. “They’re definitely going to get some decent laps in now. There’s a medium yellow blob approaching though, which will be a day-ender unless it misses or breaks up.” NASCAR is currentl…