There are still some question marks as to how the system tonight will ultimately unfold and the impacts for the rest of the weekend. Some of the models are now showing a second wave crossing through the region overnight Friday into Saturday with some coastal development that may have impacts for the northern areas.
For now, and just a tentative guess that I’ll refine later, but sleet and snow should develop after midnight and continue into the morning commute on Friday, ending by mid-morning. Accumulations of 1 – 3″ from the ICC north. Less frozen precip is expected to the south that would cut down totals around the DC area.
If there is another wave that develops, that would bring precip back into the area overnight Friday and Saturday, but that is low confidence right now. I’ll update later this afternoon after the midday model runs.
The Weather Mill 