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Forecast for the Roar Before the Rolex 24

1/2/2017

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By Doug Schneider
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Racing season is almost here! Like a robin signaling that spring is just around the corner, the Roar is the sign to eager race fans that we don't have much longer to wait.

My confidence in this forecast is on the low side, because the models have not been in good agreement on the pattern across the United States for the coming weekend, and there have been big changes from one model run to the next. This forecast is a compromise between models that are showing very different timing of rain, but it is the scenario that appears most likely to happen at this time. 
Friday should have good weather to start the Roar, with mostly sunny skies and highs in the upper 60s. 

After Friday is when the models really disagree on the timing of a low pressure system moving across the Southeast. One shows rain arriving as early as Friday evening, while another is about 24 hours slower, bringing in rain on Saturday evening. With a lot of uncertainty, I will make a middle-of-the-road forecast between the two extremes, and have a chance of rain during the day on Saturday. Stay tuned to later forecast updates for better refinement of the timing of the rain chances. 

I expect that any chance of rain will be gone by Sunday morning as the models place the cold front off the Florida coast by this time. Behind the front, there will be cooler temperatures in the 50s, along with a stiff northerly breeze of 10 to 20 mph, with some higher gusts at times. 

Thanks to Scott for creating the new forecast graphic. Notice that we have the new impact indicators on the forecast - you can learn more about what they mean here.
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    Authors

    Doug Schneider, Scott Martin, and Stephen McCoy are race fans and meteorologists dedicated to providing accurate forecasts and timely weather updates at racing venues around the world. We forecast for IndyCar, Indy Lights, Pro Mazda, USF2000, IMSA, Blancpain World Challenge America, and World Endurance Championship, as well as major SCCA and NASA events.


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