By: Stephen McCoy - @stephenmmcc
A picture-perfect weekend is in store for Indycar for the season finale this weekend at Sonoma Raceway. The eastern edge of an upper level trough will be over the region through early next week with winds primarily from the southwest during this period. The winds will bring mostly dry air to the region during the weekend aside from the later hours on Friday, where some more moisture will cause light cloud cover into the evening and nighttime hours. Surface winds will be around 5-10 mph each day, generally from the west, but they could fluctuate between the northwest and southwest. With plenty of sunshine, temperatures will reach the mid to upper 70's each day, with dew point temperatures in the upper 40's to low 50's, keeping the heat index close to the air temperature.
On Sunday, some fog looks to be possible as saturated air at the surface will be present under a temperature inversion and dry air aloft, but it will erode into the late morning with clear conditions returning for the race.
On Sunday, some fog looks to be possible as saturated air at the surface will be present under a temperature inversion and dry air aloft, but it will erode into the late morning with clear conditions returning for the race.
