On other threads, people mentioned the Pendragon RPG. This made me think of the seasonal system of Pendragon, and the random events as well. It just so happens that I recently wrote a set (inspired by the Pendragon original) for the L5R game, along with notes that I created about semi-random scenarios and family generation. I've also included some character sheets that I frankenstein-ed from previous sheets.
My group suggested that I share my work here, so if anyone's interested, here's the link.