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Boston, points north and west expected to dodge the worst of monster ocean storm

This graphic depicts just how quickly the snowfall totals climb as you go south of Boston and especially across Cape Cod.
This graphic depicts just how quickly the snowfall totals climb as you go south of Boston and especially across Cape Cod.

A powerhouse storm is developing this evening well off the coast of the Carolina’s and will quickly deepen into a significant storm that would have been one for the ages in these parts if it tracked further west. But, that is not the case in metro Boston, points west and the North Shore. Because of the size and strength of this storm we can expect very gusty winds and some light amounts of snow from Boston north and west with the more significant impacts across coastal southeast Massachusetts, Cape Cod and the Islands.

As of this evening metro Boston is under a Wind Advisory from 6 am Wednesday morning until 8 pm Wednesday evening for winds that are expected to gust upwards of 50 mph. This will be the big story locally not the snow or any other aspect of what this storms impacts would have been. It will be a different story as you go south of Boston, especially once you are into Plymouth County with conditions deteriorating quickly as you approach the Cape Cod Canal and points across Cape Cod and the Islands, where High Wind Warnings and a Blizzard Warning are in place as issued by the National Weather Service. Be prepared for the possibility of power outages locally as falling tree limbs could take down power lines. Power outages will most likely be more numerous across southeast Massachusetts and Cape Cod.

There is going to be a very sharp cut off line between the heavy snow as areas south of Boston may pick up 2 to 5 inches of snow, highest amounts into Plymouth County, increasing 5 to 10 inches, perhaps locally more, for some across Cape Cod and the Islands. However, in our forecast area snowfall will be light with only a coating at most across the Route 495 belt and inland Merrimack Valley to perhaps an inch or two closer to the coast and the immediate Boston area. Cape Ann could see 3 inches or so.

Coastal flooding potential, along with beach erosion is expected to be confined to Cape Cod and the Islands, perhaps as far north as Plymouth County. It appears the North Shore coastline will be spared from coastal flooding although some minor erosion is possible but not expected.

Snow breaks out after midnight north and west of the city with the possibility of a burst or two of snow right along the coast during the morning commute. It appears the morning commute for those in the immediate Boston area and points north and west will not see much impact from the storm but do be aware if you need to travel south of Boston conditions will be worse from Plymouth County southward. Locally, snow ends mid to late morning with brightening afternoon skies well inland.

The winds are going to begin to ramp up after midnight then become very gusty around daybreak and last through the day, Wednesday night and Thursday as it remains cold and blustery for late March. Then on Friday a big turnaround as temperatures climb above normal but there is the chance of showers that could linger into the weekend.

Short Term Outlook:

Metro Boston, North Shore and Metro West:

Tonight: Cloudy, intermittent light snow after midnight. Becoming breezy. Cold, low temperatures in the upper 20s. Winds gradually turn northeast and then increase after midnight with gusts to 25 mph by daybreak.

Wednesday: Periods of light snow, especially closer to the coast, ending mid to late morning from west to east. Remaining mainly cloudy through the afternoon. Becoming very windy. Cold, high temperatures in the mid 30s. North winds 20 to 30 mph with gusts to around 50 mph likely.

Wednesday night: Partial clearing, very windy and cold. Lows around 20 degrees. Gusty northwest winds to near 45 mph possible.

Thursday: Partly sunny and windy. Highs near 40.

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