UPDATE March 2nd, 2pm EST: After seeing the latest model forecasts and trends, I would probably shift the 4-8″ and 8-12″+ contours south by about 15-20 miles.
Shifting everything a bit south from the initial forecast and added locally 12″+ wording for the mountains. Accumulations are for snow and sleet, though it will be a mostly snow event in the higher total areas.
If the sleet holds out for longer in the morning then totals may be cut down, but on the flip side once the cold air does arrive, we could start to see some higher ratio snowfall.
Models may continue to drift south, but I don’t think it will go much further south if they do. For the DC area, expect some rain to start tomorrow afternoon, which may briefly change over to freezing rain before the sleet moves in. After some sleet, over to all snow probably a little before morning rush hour… then snow through the afternoon hours.
And then we get hit by frigid air. Joy.