 Was it cold air over hot air or vice versa, or can it go either way? There are actually warm front occlusions. There's another term for it now that is niggling the back of my head, and I can't think what it is. It's some other term that they use. I don't think occlusion is kind of an arcade term. It's something else. So maybe one of my weather geek friends listening can text me and let me know. But, yeah, it's a whole different terminology in today's weather world.