NEVER install any mod mid patrol.
BTW every time you save your patrol you reset the weather change probability counter meaning
at least another two days of the same type of weather. I agree the SHIII weather is crappily modelled but it helps if you understand how it works. This rule applies even with the weather mod.
There are also records of hurricanes lasting up to 28 days so with the build up and aftermath it could be conceiveable to have nearly 50 days of bad weather albeit highly unusual:
http://en.wikipedia.org/wiki/1899_Hurricane_San_Ciriaco
http://en.wikipedia.org/wiki/Hurrica...ger_%281971%29
Its the weather you can't change it.