An extra set of Intermediate tyres will be made available to drivers ahead of Saturday's final free practice session for the Turkish Grand Prix, with overnight rain expected at Istanbul Park.
Current weather forecasts are predicting that light rain will arrive in the area on Friday night and continue through Saturday morning, meaning FP3 and potentially qualifying could be affected.
As such, drivers will have an additional set of the green-marked Pirelli Intermediates for use in FP3, which is set to begin at 12:00 local time (10:00 BST).
"Based on the weather forecast from the official weather service provider, one (1) additional set of Intermediate tyres will be made available to each driver before P3," read a brief message to the teams from FIA Race Director Michael Masi.
Rain recently played a role in the Belgian GP and Russian GP weekends.
At Spa-Francorchamps, the race was called off after just a couple of laps behind the Safety Car due to heavy rainfall; at the Sochi Autodrom, FP3 was cancelled but conditions cleared sufficiently for qualifying to take place.
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