Forecast for Adelaide: Warm and dry. Temps near 30C (86F). Winds from the ENE, about 10mph. ENE is about right to left perpendicular across the grid.
2 Days, 9 hours. Austin will be chilly (6oishF) and mostly dry. There's a chance of a front dropping a little rain Saturday morning, but any showers should be scattered or isolated and be gone by noon. During the race, winds will be mostly out of the NNW at 10ish mph, which is right to left down the back straight.
Normally, I'd leave NASCAR to the professional (@NASCAR_WXMAN), but it's my home race. Short story: Warmish and dry. Temperatures will be about 80F, and winds will be light and variable, but I would expect upslope flow during the day. This puts winds from the WNW, which is right to left as the drivers hit the middle of turn 1.