Replying to NS Car Geeks

Help me find a tire here please.

I'm a Cartard and know nothing about tires. I just noticed that my Nokian All terrain tires have gone 100% bald and need to replace them ASAP. I have a 2001 Subaru Outback and have no idea what to look for. I live in the National Forest south of Breckenridge, so I need good snow traction that will also work well on highways. Myy daily drive consists of driving out of my dirt driveway full of snow onto a dirt road full of snow onto a highway often full of ice and then through Breck to Frisco so I need a good gripping tire that won't wear away with a lot of highway miles.

Sadly, I don't even know how to tell what size my tires are, but I think my rims are 16" wheels/rims.

Super karma for anybody who can give me some good suggestions since I'm clueless on the issue.