Sorry to hear of your problems with I81.
Chances are excellent you’ll find snow squalls to be extremely rare once you complete your move to Bluffton :-)
This was a completely different experience -- these squalls in PA last Monday roared in out of nowhere, and instantly killed all visibility in the middle of broad 'daylight'. Not fun when you're on a relatively unfamiliar major highway, surrounded by 18-wheeler trucks and cars. :-(
I am very grateful we arrived safely back in CT last Monday night.