Sprinkles of rain, modest flashes of lightning and occasional claps of thunder heralded the arrival of ACL Fest Day Two on Saturday, resulting in a delay of about 45 minutes from the scheduled 11 a.m. gate-opening time.

Acts' performance times appeared to be staying on track, as most early sets were scheduled to start at noon. The opening-signal "Star Wars" theme blasted out over the grounds at 11:49 a.m.

A few hundred early-arrivers at the main east gate waited patiently during the delay, in chairs or sprawled out on the pavement. Those who arrived early in hopes of catching the 11 a.m. Texas-Oklahoma football game kickoff were out of luck, other than following along on their phones as the game was tied 7-7 midway through the first quarter.

Edward and Edward Jr. Mendez of Corpus Christi and Julie Mendez of San Marcos were among the early arrivers. Edward, wearing a Metallica T-shirt, said he came mainly to see their headlining show at 8 p.m. "It's the show to see," said Edward, who says he's  seen the band many times in Corpus Christi, Houston, San Antonio and elsewhere.

The early lightning flashes were perhaps a good omen for the many Metallica fans wearing shirts in the band's trademark lightning-bolt-styled logo font. Other acts in prime slots Saturday include Justice, St. Vincent, Nelly, Residente, Chvrches, San Holo and the Deftones.

More weather delays might be possible throughout the day, with Austin-area forecasts calling for isolated thunderstorms.