Joseph's Gmap4 site is pretty doggone amazing. I sure like using the site, Joseph!
Blue Grouse, I think you were correct about the smoke being from the Fish Fire. Since the Mt Williamson webcam showed more clear skies, the Whitney smoke had to be coming from the southwest.
In fact, playing with Joseph's Gmap4 fire link, I can zoom out, and there are arrows showing the prevailing wind direction, and it shows the Fish Fire directly upwind of Owens Lake. The Rim Fire smoke is blowing northeast over to Nevada.
