Riot Fest will be announcing around 40 bands for its 2012 lineup tonight at midnight (assumingly midnight CT since the original Riot Fest is based in Chicago). Check out the update below:

“First Wave of announcements (around 40 bands) for Riot Fest 2012 will be announced at Midnight.”

Many bands have already been revealed for Riot Fest East in Philadelphia, including the Promise Ring, Refused, August Burns Red and others.