By Doug Schneider

The penultimate round of the Trans Am Series will be at COTA this weekend, and after a front moves through on Thursday, the weather looks like it will be nice in time for race day. 

On Thursday, a front will be pushing southward across Oklahoma and northern Texas. This will bring a good chance of showers and thunderstorms at the track as teams load in and start to practice. Storms will be possible at any time of the day, but it looks like the afternoon will have the best chances. Indications are that this front will push through on Thursday night, and high pressure will build in behind it. A northeasterly flow of dry air around the high should provide dry and mostly sunny conditions on Friday and Saturday, with comfortable temperatures and humidity levels both days. 

By Doug Schneider

Not much change to the forecast for Trans Am's weekend at NOLA Motorsports Park. High pressure will be firmly in control through Saturday. The chance of any rain on Saturday has dropped to virtually zero, and plenty of sunshine is expected through the whole event. Temperatures should be pretty comfortable too, reaching to the mid 80s. 

By Doug Schneider

Trans Am has a quick turn around, going from Homestead to NOLA in back-to-back weekends. The good weather that the series enjoyed in Homestead will likely continue in NOLA this weekend. 

The weather pattern through mid-week will feature a large high pressure ridge over the Mississippi and Tennessee Valley region, which will supply dry and stable air from the north into Louisiana. This will provide sunny to mostly sunny skies at the track on Thursday and Friday, and the humidity levels will be relatively comfortable for New Orleans. The high pressure area will be shifting east, becoming positioned near the Atlantic coast. This will result in a more southeasterly flow off the Gulf of Mexico into Louisiana, and higher humidity levels. The added moisture will bring more clouds, and possibly an isolated shower or thunderstorm on Saturday. At this point, it doesn't look like a big deal, and I only have the chance of rain at 20%. Most likely, the race will be run in dry conditions. 

By Doug Schneider

Homestead-Miami Speedway was spared the brunt of Hurricane Matthew on Thursday. The maximum wind speed recorded at the airport, which is very close to the speedway, was a gust of 38 mph. The total rainfall from Matthew was 0.95 inches. 

Today will be hot and humid, as highs will be in the lower 90s, and dewpoint temperatures will be in the mid to upper 70s. The humidity will make it feel like it is over 100 degrees. If you're at the speedway, stay hydrated and take frequent breaks in a shaded area. 

Tomorrow should have slightly lower dewpoints, in the lower 70s, so it won't feel quite as muggy as today. Highs will be around 90, and winds will shift to the north at 5 to 10 mph.

Today is a very special day at Racecast Weather. Doug and his family welcomed a new bundle of joy this morning. Emma Louise is a beautiful and healthy baby girl. Mom, and dad, are doing well. I'm sure he'll post a bunch of pictures up on his Twitter feed and Facebook sometime within the next few days. Not only is there a birthday in his family, there is one in mine as well. My son, Shelton, turned 13 today. So as you can see, October 7th is a special day for Racecast Weather.

Now, on to the forecast update for the Pirelli World Challenge at Mazda Raceway Laguna Seca. Pretty much the same forecast that I gave earlier this week. High pressure is building over the area, and this will temperatures to warm nicely for today and tomorrow. An onshore flow will start on Sunday and will bring temperatures down a little, but overall, the weekend is a great one. Mostly sunny to sunny skies with highs in the low to mid 80s throughout the weekend. Rain is not expected, and all you will need is sunscreen and shades. Radar is up on the Pirelli World Challenge website, click here to go to the site, then click on link beneath our logo.