Sunny raining?
I know it sounds bizarre, but it happens *all the time* in the Phoenix area. Well, not lately, because we've been without rain for 140 days straight now (z0mg it's teh gl0bal w4rming!!1!!!), but it is a unique thing, to be raining hard and be able to see blue sky. I'm sure it's not uniquely a Phoenix thing, but I never saw it in Chicago.