It's very simple. The weather improves dramatically if any of the following apply:-
1. The aircraft has gone tech.
2. Your mother-in-law is having a lunch party.
3. The tanks are empty and the fuel bowser has broken down.
4. All the aircraft slots are fully booked.
5. It is the weekend that you promised your wife/partner that you would without fail redecorate the bathroom.
No doubt others more worthy than I will be able to expand on this list for you.
Mike
