Many more experienced drivers here than me. I drive in a climate where we might go one winter with very little snow, then the next could have blizzards frequently.
This will be my third winter in feeders. The first year went without a flaw. Last year was much worse.
Everyone here has given good advice. The only thing I haven't seen, is what I feel is the most important advice I was given.
If things get real tough, where you start to feel unsafe or fearful of getting in an accident, pull over and wait until you feel safe. If that means your loads miss a sort, than that's what it means.
Sure, if you call them to say your pulling over, chances are, they will put some pressure on you. But what you MUST remember, if you run off the road or get in an accident, no excuse you give them will stop them from saying you were being unsafe.
They play both sides of the coin. That's ok, we understand this.
It's your job to protect yourself. If you need to pull over and wait the storm out or wait for salt trucks and snow plows to clear the road, then wait. No job is worth getting killed for, and you don't want to lose your job because you took a chance that backfired. Just make sure you communicate with your on-road supervisors if you need to pull over. Make sure they know what you are doing.
Be safe, man.