From as early as Sunday night and Monday, this weekend's weather forecast for NASCAR's race at Michigan International Speedway looked flawless. But there is a reason I don't post forecasts before Wednesday: Most of the time, they will change and this forecast did.

Most of the weekend is warm and sunny until we get to Sunday. The high pressure that has provided sunshine for most of this week will break down going into Saturday night and Sunday. This will allow a disturbance to move through and increase the change of showers and thunderstorms for Sunday.

The main concern I have for this forecast is the trend of the forecast models. They've been increasing the threat of rain for Sunday not decreasing it with each new update. Will continue to monitor and have an update later tonight.

Please follow me on Twitter @NASCAR_WXMAN and like me on Facebook for the latest weather updates through the weekend.

Conditions in Brooklyn, MI: Click here for Current Weather Conditions – Look at Doppler Radar | Mobile Friendly Site | Mobile Radar

THURSDAY:
4:05 p.m. EDT
ARCA Series practice – Sunny skies – temp: 80

FRIDAY:
8:30 a.m. EDT
Nationwide Series practice – Sunny skies – temp: 67
10:00 a.m. EDT
ARCA Series qualifying – Sunny skies – temp: 75
11:30 a.m. EDT
Nationwide Series practice – Sunny skies – temp: 81
12:30 p.m. EDT
Sprint Cup Series practice – Sunny skies – temp: 83
2:00 p.m. EDT
Nationwide Series final practice – Sunny skies – temp: 84
3:30 p.m. EDT
Sprint Cup Series final practice – Sunny skies – temp: 85
5:15 p.m. EDT
ARCA Series Race –Sunny skies – temp: 86

SATURDAY:
11:05 a.m. EDT
Nationwide Series qualifying – Mostly sunny skies – temp: 83
1:10 p.m. EDT
Sprint Cup Series qualifying – Mostly sunny skies – temp: 86
3:45 p.m. EDT
Nationwide Series Race – Mostly sunny skies – temp: 88

SUNDAY:
12 p.m. EDT
Sprint Cup Series Pre-race – Mostly cloudy, chance of shower or storm – temp: 84
1 p.m. EDT
Sprint Cup Series Race – Mostly cloudy, chance of shower or storm – temp: 84
2 p.m. EDT
Sprint Cup Series Race – Mostly cloudy, chance of shower or storm – temp: 86
4 p.m. EDT
Sprint Cup Series Race – Mostly cloudy, chance of shower or storm – temp: 88