850 mb winds, temperature and precipitable water
Notes:
A 50 to 70 kt southerly jet at 850 mb developed along and just east of the east coast on the 15th. The jet brought precipitable water values of well over an inch north to southern New England. Isentropic lift associated with this low-level jet produced very heavy rain along the east coast. The 850 mb zero degree isotherm got as far north as southern New York on the 15th, then collapsed southeast into the storm center early on the 16th.
Slide 6