Getting stuck in the car in snow is also my number 1, mostly because over the years in the D.C. metro area, it has happened to me twice. Would have happened a third time, except I went to a hotel across the street from work and got a room.
Finally, the local governments are beginning to fess up to the fact that they can't handle a big snow storm. There is now an acronym for their recommendation. SNOW= STAY off the roads, NOT OUT in the WEATHER.
They also recommend having a "go-kit" of "emergency supplies" with you "at all times."
The local news report is pretty vague, but at least its a start:
http://www.wtop.com/?nid=41&sid=2673251