It's a very small change, but I noticed a few things today. I can't look directly at the sun, as it's too bright even through the smoke. Yesterday it was just a red ball in the sky. Area temperatures show thinner smoke and continued warmer temperatures at higher elevations.
Yacolt is 74 while its 64 in BG. Near the fire it's around 70. Larch Mountain is also 73/74.
I also noticed that this morning you could not see the top of Mt. Adams on this satellite image, but this afternoon you can. You can also see the Big Hollow Fire and the Oregon fires under the layer of smoke.