The first storm will come in Tuesday afternoon and will start as snow from Boston points north and west, and will become steady by around 6 PM. Gradually, the snow will change to rain from SE to NW, changing to rain my midnight in Boston. However, NW of 128 will have a longer period of snow, so more snow accumulation expected there. Wednesday will bring a cold and soaking rain most of the day, as warm air comes in off the ocean. Then, we will have break before a more powerful storm comes up the coast for Thursday night through Saturday. As always, the track is key. If it tracks south of Nantucket, then we could have a blockbuster snowstorm. However, a track right over us or to the west would give us mainly rain.
Storm #1 timeline: Precip will be delayed compared with my forecast yesterday
Tues 7 AM: light snow possible, except light rain south of the city.
3 PM: Light snow becomes more widespread
6 PM: steady snow arrives in Boston, with rain south of the city.
9 PM: begins to mix with rain in Boston, still snow to the NW.
Midnight: changes to rain in Boston, still snow NW of 128.
By dawn: Rain everywhere east of Worcester, as temps reach the upper 30's.
8 AM- 4PM WED: Rain, heavy at times, although some sleet may mix in. Rain/Snow line moves into western Mass!
Amounts before the rain: Inches
6-10: North and west of 495. Especially SW NH.
3-6: North and west of 128. Including areas like Concord, Sudbury, Topsfield, Natick, Reading.
1-3: A line from the immidate Boston area to Providence. Including Medford, Dedham, Westwood, Walpole. About 2 inches in JP.
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