Na just looks like most of America so that's all good.
If I'm not mistaken, a small portion of Yellowstone Park had erupted once before, and the ash cloud covered a majority of the United States within a few hours, and reached about half way into the Atlantic Ocean before it all finally settled and dissipated.
I could be wrong though. However, I don't think I am.
A smaller sized volcano in Iceland erupted in 2010, and covered a large amount of Europe, which you can see here:
"Essentially, the United States and much of the world would be brought to its knees.
But the carnage doesn’t stop there. The spread of volcanic ash, rocks and gas would immediately cease any sort of air transportation in much of the world."
You can read up more on it here:
http://www.ryot.org/supervolcano-yellowstone-volcano-will-it-erupt/765673
