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Boston Weather: 38.0°F | A Few Clouds

Weather: Rainy Easter Weekend

By Bill Ramstrom
STAFF METEOROLOGIST -- A large, moisture-filled storm is approaching New England from the west, and will bring a prolonged period of rain beginning today, lasting into Sunday. With strong flow from the south at higher levels in the atmosphere, copious moisture will be transported from warmer regions and rained out here this weekend. Rainfall amounts of 1"-3" are likely, which ought to bring the precipitation totals for the year up to normal levels. Winds at the surface will bring in cool air from the east and southeast, where ocean temperatures remain in the 40’s.

The storm we will experience this weekend is moving slowly because there is cyclonic flow both at the surface and at upper levels of the atmosphere, over the same location. Usually, an upper-level system remains to the west of the surface cyclone, leading to more rapid motion of the low-level storm. However, when they are vertically stacked, each reinforces the other, and does not provide forcing to help move the other along. In fact, long-range forecasts are showing the possibility of this storm hanging around through the middle of next week, bringing cloudy, damp weather.

Weekend Outlook

Today: Rain and drizzle with a cold wind. High 46ºF (8ºC).

Tonight: Heavy rain with strong east winds. Low 40ºF (4ºC).

Saturday: Rain continues, lighter winds. High 50ºF (10ºC).

Saturday Night: Rain showers. Low 46ºF (8ºC).

Sunday: Mostly cloudy, maybe a peek of sun, or a shower. High 56ºF (13ºC).

Monday: Some clearing. High 59ºF (15ºC).