Talk:Crystal Empire/@comment-26973802-20131006054815/@comment-5837525-20131009062627

Remember that the Crystal Empire has very few Pegasi with which to regulate its weather compared to other places in Equestria. Also remember that the Crystal Empire has been gone for a thousand years. Before its reappearance, there was probably no need to regulate weather in the Arctic North because nopony was living there at the time. It's possible that, because of the few Pegasi available, the only weather maintained in the Empire is that which is directly above and near it.

In The Crystal Empire - Part 2 (when the Mane 6 are walking to the train) and Games Ponies Play (when the Mane 6 are on the train), the sky is clear. In both of these scenes, they're reasonably close to the Empire. But in Just for Sidekicks, when Spike and the CMC are on the train, they're farther out, outside of the Pegasi's weather regulation perimeter.