I don't understand how some think OPs are locked in 4-5 days out. While people always point to January 2016 as being "locked in" and not shifting, forget that for many model runs, it appeared NJ/NYC was on the outside, looking in. When all was said and done, NYC ended up with more snow than DC. Obviously different setups and different reasons for the "north shift" but I'm not sure why people assume this is the final solution. Obviously, mountains of NC and SW VA are certainly favored for seeing the highest impacts but NVA/DC/Central MD are certainly not out of the game at this point.