If anything.... and these are truly minor nits.... I would have more water pouring off the starboard side of the saucer and more splash/spray lit up by the lights. With so much weather going on, the lights should all be very visible with halos of shine around them from the rain -- but not
lens flares, because the brightness of them would be more scattered... Also, I imagine certain parts of the ship (notably all the engines) to be quite warm and I think adding in some appropriately scaled steam from the nacelles and the impulse deck would be welcome additions. Also I'm not sure water would pour off the upper edge of the saucer like that, but don't change it
because it looks damn-good there even if it doesn't quite add up...