Low pressure develops across the mid-Atlantic and northeast today and tomorrow
Rain & snow spreads across the state after dark this evening, ends by dawn
Notable accumulations north of Route 80
Christmas Eve will be wet for most, but for those north and west of Route 202, you may wake up to some white tomorrow morning. A developing area of low pressure is sliding northeast along the coastal plain of the eastern United States this afternoon and evening. Moisture is spreading across New Jersey with it, and precipitation will begin around 7 p.m. tonight. This light event will be all rain south of 195, and mostly rain after a few early flakes along the Route 1 corridor. For northern New Jersey, expect a more gradual transition from snow to rain showers later in the evening.
As the developing coastal low deepens to our east, cold air will rush back into the region. This will change remaining precipitation back to snow in the pre-dawn morning hours. It’s also likely for elevated portions of Warren, Sussex, and Passaic Counties that snow never turns to rain at any point over night. These would be the only portions of the state that I would expect any kind of travel issues tomorrow morning. In general, look for a coating to two inches north of the 202 corridor, with the elevated parts of the state seeing a bit more. Most of the snow falls while we’re asleep, and it’s sunny day once lingering morning clouds clear out. We might need to watch for some overzealous lake effect snow bands streaming far enough to spread some flurries into northern New Jersey at times Monday night. In general, however, it will be a chilly, picture-perfect Christmas. The rest of the week looks cold and clear. Enjoy the weather and the holidays.