An upper level high pressure ridge is still expected to remain over the southern Plains through the weekend, keeping the heat contained closer to the surface. South to southeasterly winds at the surface will bring slightly above-average air temperatures to the region while dew point temperatures remain consistent with the rest of the week. There could be more of shift to the east as Cristobal approaches the Gulf Coast, however the system is not expected to affect the race otherwise. Southerly winds in the low-to-mid levels bringing moist air from the Gulf will result in some partly cloudy conditions into the afternoon and evening, though drier air aloft will inhibit convective development.
Maximum air temperatures are expected to reach the mid 90's, with dew point temperatures in the mid 60's bringing the heat index to the upper 90's. Race-time temperatures will still be around 90, slowly cooling to the mid 80's by the checkered flag.