Sandy is an increasing threat to morph into a major storm for the NE in the next few days as it moves north and interacts with a strong jet stream moving from the west and becoming stronger as it heads toward the east.  The combination still has a moderate risk (now 60% chance) of becoming the "Perfect Storm" of 2012.  Here is the latest track.  The "cone" is about the 70% probability of the path of Sandy and what will likely become a fierce hybrid coastal storm. 

The various simulations we look at are beginning to converge to this major storm coming ashore around the Delaware to New Jersey shore. 

Here is my discussion I did earlier of what is so unusual and reason for concern. 

It's a mix of a tropical/hurricane pattern getting combined with an amplifying winter-like jet stream pattern.  The makings of another "Perfect Storm"?  Very possible.