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

NASCAR Nationwide Series - Bristol on Friday at 7 p.m. ET on ESPN.  Conditions look very nice for racing Friday evening.  Look for sunshine along with a few passing clouds.  The temperature at race time will be a pleasant 81 degrees.

NASCAR Sprint Cup - Bristol on Saturday at 7 p.m. ET on ABC.  It should be nice for qualifying on Friday afternoon.  The temperature will be around 85 degrees.  Saturday again will feature good conditions.  Look for a few passing clouds in the afternoon.  The high temperature will approach 84 degrees.  At race time, it will be around 80.

IZOD IndyCar Series - Sonoma on Sunday at 4:30 p.m. ET on NBC Sports Network. The weather looks quite pleasant for the whole weekend in Sonoma!  On Saturday, look for a mostly sunny sky with a temperature around 79 degrees.  It will be mostly sunny again on race time with a temperature around 80 degrees for the race. 

Don't forget you can hear me on Sirius-XM Satellite Radio's Sirius Speedway, channel 90, every Thursday around 3:30 p.m. ET!  You can also "like" me on facebook:  Cassie Behofist TV3.  Follow me on twitter too!  www.twitter.com/weathergalcass