It's actually been erupting for days, but until today, Anchorage was not hit by the ashfall. It's not deep by any means, but it's persistant in the air, which means everyone needs to wear masks outside, and you can't drive because the air filter will get owned. This could continue for several weeks--the volcano shows no signs of slowing down.
This wouldn't be as big a problem in the summer. Rains would eventually wash everything clean, but in the winter--yeah, it sucks.