I live in the southeastern US. I am aware that winter tires exist, but you simply can't buy them here off the rack. You have to order them. For our "snow", which happens once every 2-3 years, you don't even need them. In an ice storm, you just stay off the roads for two days. The heat from the sun is sufficient to melt it even if the air temperature never gets above freezing.

What you need here are tires that can handle huge amounts of rain. Which, in the western US, is not an issue.