Those high clouds seemed to be an echo of Light coming from just off of the Sunset! This is in the valley just east of Tukwilla, Washington.
Purple Fog rising from the valley over Renton, Washington at Sunrise.
The wind was blowing the fog my way at a pretty good clip, up out of the valley and over these trees right inbetween my camera and the Sun. It lookes like flame in the photo... and it did in real life as well!
