I’m doing good, how about yourself? Your game idea that sounds interesting, I’m big on open world type games so that sounds pretty cool! I’m doing something sort of similar, creating an open world driving/racing game based on the area around Vancouver BC, Canada, I won’t be recreating the entire city as that would take me years to do, I’m concentrating more on the areas around the city, highways along the water and inland with smaller towns in place of the cities. Currently building the terrain and modeling some cars, so far I have my Ferrari 458 Italia in game to drive around, setting up vehicles with proper physics is so much simpler in engine, and it has been a lot of fun building it so far!
About the weather, that is something I also want to work on for my game (water too!), I just remembered I had seen a video on creating rain (they used a waterfall effect from the " Cave" content example in the marketplace, which also shows how to set up dense fog that could help the effect as well) but the video is in German, so I had to try and follow along without sound. is the video in case you are interested, you can still get a good idea of what they are doing without the sound:
https://www.youtube.com/watch?v=D_6VKS2nNMU
Hope that helps!
