This site is being deprecated.
Please see the official X‑Plane Support page for help.
Weather in X-Plane is designed to be random. Every time you start X-Plane you should get a different sequence of random-ness. If you don't believe this is happening for you, first remove all addons to see if that affects it. If you still have problems, file a bug report here with as much detail as possible--all weather settings, aircraft, airport, etc.
This site is no longer being actively maintained.