It's in Storm Front:
Like the Unseelie Incursion of 1994, when the entire city of Milwaukee had simply vanished for two hours. Gone. Government satellite photos showed the river valley covered with trees and empty of life or human habitation. All communications ceased. Then, a few hours later, there it was, back again, and no one in the city itself the wiser.
According to the timeline that someone on the site has made, that more or less corresponds with the last time the Unseelie Accords were updated.
Richard