By: Stephen McCoy

Nothing unexpected in the raceday forecast for Indycar's return. Current temperatures in Fort Worth are in the low-to-mid 90's with heat index values approaching 100 F. Conditions will begin to cool as the race gets underway; air temperatures around 90 F will be present around the green flag. By the end of the race, temperatures are expected to be down to the low 80's, though with dew point temperatures near 70 F, heat index values will still register around 90 F. Winds are currently directly from the east due to Cristobal's approach towards the Gulf shore, and will likely stay that way through the rest of Saturday. Partly cloudy conditions are anticipated through the race, though some of the clouds could begin clearing closer to the checkered flag.

By: Stephen McCoy

There isn't much to note in the updated forecast for this weekend's GENESYS 300 other than a possible change in wind direction/speed as the day progresses.

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.

By: Stephen McCoy

For much of this week leading up to race day, an upper level high pressure ridge will sit over the southern Plains, keeping heat and moisture closer to the surface. A local area of high pressure at the surface located over the Ark-La-Tex region will cause southerly to southeasterly winds to bring in said heat and moisture from the Gulf of Mexico on Saturday. Minimum and maximum temperatures for the day are expected above the daily normal as a result. In addition, dew point temperatures in the mid 60's F will likely result in maximum heat index values in the upper 90's F. Temperatures for the race are expected to hover around 90 F, possibly reaching the mid 80's by the end, however similar dew point temperatures will keep "feels like" conditions a few degrees warmer.

Conditions will be mostly clear through Saturday morning, though as temperatures begin to warm, partly cloudy skies will begin to build in at the lower levels. The aforementioned upper level high pressure will help inhibit any convective development and for now, there isn't any kind of precipitation expected.

By Doug Schneider

Each year at Racecast Weather, we collect photos through the year of our two favorite things - weather and race cars - and pick the best to be featured in a final post to close out the year. Thanks to the extremely talented photographers (and not so talented, like myself) who took these photos - credit for each pops up when you hover over each image. Click on each image to view a larger size.

Thanks for following our forecasts through 2019, and Scott, Stephen, and I hope you have a very happy Christmas season. We'll see you again on December 30 with the forecast for the Roar Before the 24 in January.

By: Stephen McCoy

Minor changes to temperature in this update with warmer weather expected for Saturday. Sunday's conditions will begin mostly clear, though as the day progresses cloud cover will slowly move in due to southwesterly winds in the upper levels ahead of an upper level trough. Partly cloudy skies are anticipated for the Grand Prix, though heavier cloud cover will move in for the remaining on-track sessions. Northwesterly winds overnight and into the morning on Sunday will cause a cooler high for the day relative to the rest of the weekend. Fog remains a possibility for all three days, though Friday remains the most likely for foggy conditions during the morning.