AUSTIN -- Attendees of the 2018 Willie Nelson's 4th of July Picnic were asked to evacuate the Austin 360 Amphitheater at Circuit of the Americas and seek shelter Wednesday afternoon after severe weather rolled in.

At 2:44 p.m., a strong thunderstorm was approaching COTA and the airport. 50 mph wind gusts are possible with this storm, along with cloud-to-ground lightning.

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The event began at 11:30 a.m. with a performance by David Allen Coe, and was expected to end with a performance by Willie Nelson and family at 11:30 p.m. Event officials said they planned for festivities to resume after the worst of the weather passed.

Austin 360 tweeted that fans would be allowed to return at 5 p.m., with Lukas Nelson & Promise of the Real performing at 5:25 p.m.

Austin 360 was giving updates on the picnic on Twitter.