I mostly play with 180 minute day length, clear weather, dynamic weather disabled. This is mostly because I am constantly building and testing vehicles. I was just flying around this morning, when I realized my pc had dynamic weather on (result of resetting windows and reinstalling SP). This revelation came to me in the form of stormy weather. This was SO COOL!!! I will be using dynamic weather and 10-15 minute days from now on unless I need to see things in detail!!!

I am thoroughly impressed by the work put into this feature, especially with the shading of the sunrise/sunset!