This may not be the most useful weather app out there, but in my opinion it *is* the most beautiful weather app in the App Store — down to the icon.
Update: [I am being told](http://twitter.com/joestracci/status/217719336587112448) there is a bug in the app right now that keeps location services running (a fix is in the works). (I disabled the apps access to location services in the Settings app to avoid this for now, but that makes the app not work.)