Hand blowing just OKed

Here's a curious one. Home-plate umpire Greg Gibson just went to Angels starter Joe Saunders on the mound before the start of the second inning and appeared to tell him that blowing on his pitching hand, while on the mound, has been allowed tonight. He then gave a signal to both benches, blowing on his own hand and extending something like a welcome signal. Kinda odd. That privledge usually is not allowed until games are played in much frostier conditions that the 65 degrees at first pitch. Maybe Gibson thinks he's in Oakland tonight.