Rain is in the forecast Sunday at Phoenix International Raceway, but the threat is for isolated-to-scattered light rain. A storm system will pass by to the south through northern Mexico. The bulk of the rain is expected to fall along the Mexico/Arizona border, but a few showers could develop and fall over the track during the afternoon Sunday.
I don't expect the rain to be a problem on Sunday. If a shower does occur, it may cause a yellow flag caution or worst case a brief delay – but I don't see this being postponed until Monday.
1:30 p.m ET
Sprint Cup Qualifying – Clouds and sunshine – temp: 68
3:30 p.m ET
Nationwide Race – Partly Sunny skies – temp: 74
3 p.m ET
Sprint Cup Race – Mostly cloudy, cooler, possible shower – temp: 66