I think the 2AM showing of PME Weekend is a reprise from earlier at night, so they may or may not have a live PM Edition in the AM.
Does PMEWC stand for PM Edition West Coast? Or, if Adam Berg were to be anchoring then, he'd call it PM Edition After Dark.
Of course, it could be a big mistake, and it might really be EE Weekend. We'll see.
BTW, where do you get these Zap2It guides for times so far in the future? Obviously the guide on their site only goes forward two weeks.
Update: It looks like Evening Edition is cancelled. Here's the new weekday evening schedule7-10PM Weather Center10PM-1AM Weather Center1-2AM Weather Center2-3AM Weather Center3-4AM Weather Center