Wind change surging up the bay. It's about half way up, so probably 30 minutes out from Melbourne. The 4pm forecast looks to be right on track
In the end the change has just been a tiny bit too soon for a 47C in the Mallee. Thinking another hour or two and would have been a definite.
BTW 41.6C at Mount Moornapa (at 480m). Guess that about 46C at sea level (bascially the number scored by Avalon). Probably suggests the hottest air mass for us since Black Saturday (or possibly January 2014 which was nearly as hot)