My thoughts.
Look at the initialization of the 18z suite/hour 3 and compare it to current conditions at H5. The only model that was remotely close to being correct was the NAM, the RGEM and GFS were way too far east with the setup.
Look at the obs coming out of NYC already. The park is reporting 4.5" already and there are reasonably widespread 3-5" totals in the area. The GFS/RGEM, which have 5-10 total, are already close to busting(RGEM especially which had less than .6" liquid and nyc has .37, do you really think they only see .23" more)
The 21z RAP is well west of the 20z RAP(20 miles or so) and made a decided trend towards letting the convection influence the low less. This matches the NAM.
The Euro has been locked into the western track for days. To see it bust would be absolutely monumental, whereas I can believe the GFS being wrong due to it's poor performance and initialization scheme.
At this point, my afternoon forecast will be based off the NAM and the EURO and discarding all other models. I'm taking a shot here, hope it works. I have absolutely no confidence, but it's time to make a call, and so I'm making one. Hope luck is on my side.