Not a form I can immediately name, but I think I've seen before. I like the interlaced and looped rhyme scheme, and the meter all works. Now this one I do get. A nice story of personifying the fog and making her a mischievous character.

I think what is great about this personification is how neurotic the mist seems to be. She's clingy (naturally), and suffers "rheumatic distresses." As she expands she is aware of her own impermanence. And no one seems to like her, except for me!