It's been a few months since there's been an update to The Weather Channel app for Windows Phone. This weekend, a new version was pushed out but there's no change log to go along with it.
This would strongly suggest that this new version is just for fixing bugs. If you happen to notice anything major when you download and install The Weather Channel app, please let us know in the comments. Both the Windows Phone and Windows 8.1 versions got a major user interface redesign in February.
Thanks to Rokibul for the tip!