Here are two possibiities among many:

Is SMokey a neutered male? They get into trouble involving kidneys and urine. I forget the details, but they get blockage and cannot urinate. Result: screams of pain.

But perhaps being confined by all the snow at your place has increased tensions among the cats. Cats are meant to live solitary lives (apart from mothers with their kittens).

A friend of mine had a handful of cats. One of them, Canyon, was licking himself constantly, until his belly sported a tw-inch wide strip of nude, pink flesh. Diagnosis: too much stress from being around too many other cats. So they got him a kitty-sized collar (for the electric fence) and let him roam outside. That stoppped the licking.