As we enter Christmas Week the long range outlook to be honest remains rather confusing and to be honest, a little strange. There is absolutely no consistency with the models at all. Differences grow the further out in time we go. Some models have ridges in the same places other models have troughs. The mean flow is different on the European model verses the GFS verses the Canadian. Frankly I'm not quite at all sure where this all going in the next couple of weeks. This probably opens the door for a surprise somewhere along the line which will not show up until we get to the short range.
The first disagreement comes with Thursday as low pressure comes in from the west. Frankly I'm not exactly impressed with this and in fact the GFS model has gone much weaker with this system overnight...READ MORE AT http://www.meteorologistjoecioffi.com/index.php/2016/12/18/white-christmas-possibilities-slim-now/