Dr. Jeff Masters' WunderBlog on the Weather Underground website, offers this NASA photo of the smoke from the Wallow fire. Check out his map showing the full 1,500 mile extent of smoke moving over the Great Lakes region.
[right, smoke from the Wallow fire in eastern Arizona extends across New Mexico, Texas, Colorado, Kansas, Oklahoma, South Dakota, and Nebraska in this image from NASA's Aqua satellite on June 7, 2011. Image credit: NASA, via Weather Underground.]