La Nina winter setting up, NOAA says. Here's what that means for US

The influence of La Niña is expected to dominate weather conditions from December through February, according to NOAA. This often translates to wetter conditions in the northern tier of the country, while the southern tier may face drier-than-average weather.

Philadelphia snow forecast: More snow on the way

Another fast-moving system is headed this way and it doesn’t have a lot of moisture to work with. It will have enough, though, for a coating or even up to two inches for the entire region.