I've taken the train a few times in the dead of winter. Two winters ago, I took the overnight train back Christmas night to avoid the blizzard we were supposed to get here, which missed here but bombed New England later that Sunday. I also took the train back when I had three flights cancelled out of Boston in the middle of those bad blizzards in early February 2010.
If I go southwest, then I definitely will switch to the train. If I go USAirways, I try to make them get me back here so that I'm not out the money on the fare. JCAAC.