Thursday is looking like a mess across the DC Region as another potent, moisture-rich, winter storm moves our way. All of the forecast models start the DC area with accumulating snow Wednesday night through Thursday morning before a change over to either sleet or freezing rain occurs. There is the potential for significant accumulations of snow, sleet and freezing rain.
GFS Ensemble (American) showing 30 ensembles (opinions) for snowfall potential:
Next up is the Canadian ensemble model which shows quite a spread in snowfall accumulation: