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

NASCAR Nationwide Series - Indianapolis on Saturday at 4 p.m. ET on ESPN.  There could be some severe thunderstorms around for Thursday afternoon's practice, but drier air will work in on Friday and help to clear things out.  The afternoon temperature on Thursday will climb into the mid 90s.  It will be nice on race day Saturday with plenty of sunshine.  The temperature at the green flag will be around 88 degrees.

NASCAR Sprint Cup - Indianapolis on Sunday at Noon on ESPN.  Conditions will be good for practice and qualifying on Saturday.  Look for a mostly sunny sky and a temperature in the upper 80s.  The nice weather continues into Sunday with more sunshine and a few passing clouds throughout the afternoon.  The race temperature will start out around 85 degrees and climb into the upper 80s. 

Grand-Am Rolex Sports Car Series - Indianapolis on Friday at 4 p.m. ET on SPEED.  Friday will feature sunshine and a few clouds.  There is a slight chance - 20% - of a few storms.  It will be a warm afternoon with a race time temperature around 90 degrees.

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