Here are the forecasts for this weekend's race activities:

NASCAR Camping World Truck Series - Michigan on Saturday at Noon ET on SPEED.  Cooler air will spill into the region on Saturday behind a cold front.  A weak disturbance hanging around will keep a 30% chance of shower in the forecast, otherwise look for a partly cloudy sky with a temperature around 71 degrees at the start of the race. 

NASCAR Nationwide Series - Montreal on Saturday at 2 p.m. ET on ESPN.  For Friday practice and qualifying, there may be a few thunderstorms around the area.  The chance of storms is 60%.  The temperature will be in the mid 70s.  By Saturday conditions will improve.  Expect sunshine along with a few clouds.  The race time temperature will be around 73 degrees.

NASCAR Sprint Cup - Michigan on Sunday at Noon ET on ESPN.  A cold front pushing through the region will usher in some fall like air for the weekend.  It should be dry under a partly sunny sky on Friday afternoon for qualifying.  The temperature will be around 72 degrees Friday afternoon.  FYI it will be a chilly overnight with temperatures dipping into the upper 40s early Saturday morning.  It should be nice for practice on Saturday.  On Sunday there is a slight - 30%- chance of a shower under a partly cloudy sky.  The temperature will be around 71 degrees at the start of the race. 

American Le Mans Series - Road America on Saturday at 3:15 p.m. ET on ESPN 3.  Expect some nice weather on Friday and Saturday at Road America, in fact, it will be be a little like fall.  For Friday's activities, look for sunshine along with a few clouds.  The afternoon high will approach 72 degrees.  FYI the overnight low will drop into the lower 50s, so be prepared for a cool morning Saturday. For the race on Saturday, it looks good with sunshine and a few clouds again.  The temperature will be around 74 degrees at the start of the race.

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