Looks pretty nice. My only comments are first, does the forest really change color that way, in small patches? Are those different kinds of trees than the rest? If not I'd at least expect the majority to be going yellow if some are already red. Second, I think the rain effect looks more like smoke, I think because of the density at the apparent distance (unless this is *very* heavy rain, we appear to be just a mile or so from it, it should look less dense I think), and maybe also the edge sharpness, again because of the apparent distance. I may not be able to pinpoint exactly why the rain is not working for me, I like the idea but it needs a little tweaking IMO.
- Oshyan