Rain moving northward. There will be strong low-level warm air advection over the mid-Atlantic Sunday afternoon. This strong low-level jet will also help quickly transport moisture northward. This will be a fast moving system but there will be downpours at times. Precip amounts from the models range from just under an inch to over 1.5″ as the greatest amount. Rainfall amounts of 1″-1.5″ are likely, perhaps locally higher. There can be flooding in low lying and poor drainage areas, but flooding will not be widespread. Once the rain arrives, temperatures may fall a bit due to a large dewpoint depression and will not likely rise much. The surface low will move into southern New England this evening. Rain will end late this afternoon and it will be dry during the overnight hours. By Monday morning, the low will be over Nova Scotia. The cold front will move through Monday but it will not turn noticeably colder until Monday night and Tuesday.