Short Range American Model Uh Oh

I swear, I started talking about this storm possibility on Tuesday a long time ago.  I would have to dig it back up to find out when, but the latest run of the short-range American model that just came out has completely changed from its prior run only 6 hours ago.  It now brings a significant snowstorm to Southern and Coastal New Jersey and as close as New York City itself.  One more shift west and we would all have a significant snowstorm here on Tuesday. What is amazing is how these models so often show a storm two weeks out, then lose them, then bring them back.  It is just unreal how close this now is to being a significant snowstorm.  I have many theories as to why the models are sometimes better two weeks out then 2 days out, but I have never had anyone give a very good explanation.  It is simply stunning how the models are completing changing only 2 days before the storm. One more time and we would have a significant snowstorm on Tuesday.