Cooler temperatures and a little less wind will be the big story for Saturday night for the running of the Desert Diamond West Valley Phoenix Grand Prix. The afternoon high will only reach around 82 degrees, but will drop down to around 79 degrees at 6PM. Winds will be out of the north-northwest, but shifting out of the west-northwest at 10-15 MPH at the green flag, with a few gusts up to 25 MPH possible. The temperatures should drop to around 71-73 degrees by the time the checkered flag flies. Dust should not be an issue.