Why did I just lose twice the normal LP for a lose?

Normally in ranked I get\lose about 14-16 LP for a win\lose. I just lost a game and I lost 33 LP. Does anyone know why this might have happened? I got queued with a three man predade, 2 were B4 20ish LP and one was unranked(all three fed their butts off early), but I was B2 75 LP, so could that have something to do with it?