When a hurricane undergoes extratropical transition, which is happening right now to Sandy, there can be a temporary increase in intensity due to the baroclinic instability created from temperature gradients. Small warm and cold fronts are appearing near the center. Southern New Jersey this evening is the landfall target, but I hope everyone is prepared in the Mid-Atlantic and the Northeast.
I still can't believe a week ago that the ECMWF was showing something like this scenario happening, which I'm sure many forecasters and myself laughed at initially as it was so wacky. However, it's now coming true, so the ECMWF has definitely earned the distinction of best model in the long range if anyone had any doubt.