Unfortunately, Perfect Weather 1.2 shipped with a major bug. For users who upgraded from an older version of Perfect Weather this bug corrupts the database which deletes all saved locations and removes the “Your Location” card. Fortunately, this bug don't impact new users and is easy to fix. Just delete the app and reinstall it from the App Store. You will then have to re-enter the locations you want saved.
We are so sorry for the hassle. This update was tested thoroughly by our team and by hundreds of beta testers. We never ran across this issues and still haven't been able to determine what caused it.