Weather discussion – 10:30 AM EDT: There continues to be no forecasted threat for Darlington for Tropical Depression 9. The Friday outlook remains partly cloudy with the slightest risk of showers, which may eventually be removed. For the weekend, a ridge of high pressure is forecast to extend across the region, bringing sunny skies, seasonal temperatures and lower humidity. The full NASCAR weekend forecast will be available this afternoon.


By Friday, TD 9 is forecast to be moving closely to the South Carolina coast on Friday. This could bring a chance of showers to the afternoon activities at Darlington. This will be included in the NASCAR race weekend forecast.
Tropical Depression 9 (South-central Gulf of Mexico)
TD9_23Z_30Aug16 TD9_9
At 5 PM ET, TD 9 was located 345 miles west of Key West, FL and moving NW at 5 mph. Max sustained winds are 35 mph with higher gusts. TD 9 continues to be a poorly organized system, though there are indications that it could become better organized over the next few days. TD 9 is forecast to continue to the northwest, with a turn to the north forecast for later tonight. Landfall along the upper Florida Gulf coast is forecast for later Thursday.
A Hurricane Watch has been issued for the Florida Gulf coast from the Anclote River to Indian Pass. A Tropical Storm Watch has been issued for the Florida Gulf coast west of Indian Pass to the Walton/Bay County line.
Steady intensification remains forecast for TD 8, but the NHC forecast is for 65 mph winds at landfall. It is then forecast to continue across Florida and into Atlantic on Friday with more intensification once it is in the Atlantic. While the water ahead of the system is warm (30-31°C), the area it is moving over during the next 24 hours is shallower. With a slow moving storm, it could churn up cooler water, which would slow intensification. Where shear was an issue yesterday, today, it looks a little less so, so we can put that aside as a negative factor.
Tropical Depression 8 (US East Coast – North Carolina)
At 5 PM ET, TD 8 was located 60 miles SSE of Cape Hatteras, NC and moving NNE at 5 mph. Max sustained winds remains 35 mph. A tropical storm warning is in effect from Cape Lookout to Oregon Inlet, NC, including Pamlico Sound. While the low-level center is visible, the convection remains sporadically placed around low-level center.
Intensification is forecast as it continues to move to the NNE and gradually away from the East Coast. This will be the last update for TD 8. (The forecast track for TD 8 will be provided in the comments.)
For both of the storms, the current track forecasts are of moderate to high confidence while the intensity forecasts…not so much.
Updated: 7:30 PM EDT, 30 Aug 2016
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