With the National Weather Service predicting a mix of rain and snow for the day of WUStock as of Thursday morning, student concern over Macklemore’s slated outdoor performance has mounted.

But organizers say they will hold the concert on the Swamp, barring severe thunderstorms, a tornado warning or some other, similar act of nature.

WUStock is slated to begin at 1 p.m. Sunday, with student bands opening for the 4 p.m. performance of Ben Haggerty, known professionally as Macklemore. There will also be free food available from Chill Frozen Yogurt and Seoul Taco, a mechanical bull and an inflatable boxing ring, and Trading Post plans to host a thrift shop.

Congress of the South 40 will also be subsidizing Bon Appetit food to offer it at a discounted price.

The backup location for the concert is the 560 Music Center’s Desmond E. Lee Concert Hall, which has a maximum occupancy of 1,115. But that is a worst-case scenario and sophomore Yuwen Memon, Swamp chair, said CS40 is confident that it will not need to hold the concert there.

“The concert is rain or shine,” Memon said. “There’s no cause for worry. It is unfortunate that it got pushed two weeks earlier when the weather is a bit colder, but it shouldn’t be too bad.”

Sophomore Victoria Hulsing, director of services for CS40, added that mild winter weather wouldn’t necessarily take away from the concert.

“Most of the students that I’ve talked to about the weather are like, ‘If it’s snowing, I think that’d be really fun.’ Their only concern is a really, really bad storm,” Hulsing said. “We’re hoping to keep it outdoors at all cost.”

Some students said they plan on going on regardless of the weather.

“I think anyone would go in the snow because very few people are going to be sober,” freshman Annie Pitkin said. “I think anyone would rather have it in the rain than in the 560 Building.”

Senior Corey Cantor said moving the concert off of the Swamp would be extremely disappointing for the concert that lately has come to overshadow W.I.L.D.

“It would be a shame,” Cantor said. “Hopefully they have a plan set so it’s not completely chaotic if something happens.”

Sophomore Manar Swaby said while most people will dress in whatever layers necessary to enjoy Macklemore, rain might be another issue entirely.

“It would dissuade me. I’m not sure how that would affect everyone else,” Swaby said. “If it’s OK, then I think people will probably go out.”

While Macklemore’s performance is slated to start at 4 p.m., Mumen suggested students arrive early to avoid any possible congestion and, ideally, see the student acts onstage beforehand.

WUStock is alcohol-free and students will need to present a Wash. U. ID card. Non-students must be older than 18 and present guest tickets and some form of identification.

Setup for the show will begin around 6 a.m. on Sunday, and unlike in previous years, security will be making a perimeter around the entire Swamp, not just the stage.