I dread to think of this same setup at the end of March, with outdoor temperatures say in the low 80s, high dew points, and a cold front with temperatures just a little warmer than what we had this time. There could have been catastrophic tornadoes much further north. I wonder if the March 1993 "Storm of the Century" could have produced tornadoes had it formed farther west (instead of a blizzard). The "backside" or "thundersnow" of that storm produced one of the highest per-hour snowfall rates ever seen in northern VA.
Note, below: My Droid "severe alert" (from the severe thunderstorm warning at 7:30 PM) won't go away.