Temp was 48 to 54 degrees, only day out of the year to have the perfect conditions. When we got to the track it was 40 degrees. DA at that time was 505'. Unfortunately they wouldn't open the lanes until it warmed up and was a little safer. Well the buick hooked up and ruined it for all of us. DA remained in the 1000's all day, once went to 2000' but lowered to 1700'.