Michigan to Arizona route advice

I think you've been pointed to enough weather related apps and you'll be paying close attention. but to address "what kind of snow are we talking about"...I was headed east around Deming NM in October. Started to snow. I thought "it's the southwest, how bad could it get?" In short order you couldn't see well, I had to get right in behind a semi and follow his tracks. Soon after it was hitting my front bumper while i was in his tracks. I could feel slip ice building. Clearly I needed to get off the road. But there are not a ton of safe places to get off on some of those stretches. So stay up on the weather and know your options. Be safe, relax.