My focus on the weather forecast this weekend at Texas Motor Speedway is for Sunday. A storm system will develop in the plains and move north and this will allow for moisture from the Gulf of Mexico to flow into North Texas.
Moisture alone doesn't cause rain – you need something to cause "lift" in the atmosphere. Although there will be moisture in the air for rain showers to form, there isn't that trigger to cause lift and develop showers.
I am not ruling rain out completely, but the likelihood that rain will form is very low for Sunday's Sprint Cup race. A lone shower could form and cause delays, but I am not confident that will happen. I am just mentioning it cause it is a possibility.
Other than that, the forecast for Nationwide and Trucks looks very good, sunny and dry.
10:00 a.m EDT
Nationwide Practice – Sunny skies – temp: 37
11:30 a.m EDT
Nationwide Final Practice– Sunny skies – temp: 45
1 p.m EDT
Sprint Cup Practice – Sunny skies – temp: 55
4:30 p.m EDT
Sprint Cup Qualifying – Sunny skies – temp: 63
6:30 p.m EDT
Nationwide Qualifying – Clear skies – temp: 61
8 p.m EDT
Truck Race – Clear skies – temp: 58
9:30 a.m EDT
Sprint Cup Practice – Mostly Sunny – temp: 45
11 a.m EDT
Sprint Cup Final Practice – Mostly Sunny – temp: 53
1 p.m EDT
Nationwide Race –Mostly Sunny – temp: 65
3 p.m EDT
Sprint Cup Race – Mostly cloudy, some sun, slight chance of a shower or storm – temp: 71