So this morning i get up, and look out the window, and there's a big pillar of smoke. I went up to foothill before driving over to Garey to get on the freeway (onramp for Towne is closed, so that's not really going out of my way much) and there was a really wide column of smoke coming out of the hills to the north, expanding up into a big flat layer of smoke in the sky. That was impressive enough, but further to the west was a _huge_ layer of smoke that seemed to be from a different source.
So later on the radio i heard that there's a big fire north of Glendora. Not _really_ big, but about 150 acres according to CNN. Certainly enough to explain all the smoke to the west, and the smaller fire was probably responsible for the ash i saw, unless the wind was more westerly last night and the ash from Glendora was getting that far.