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On April 1, 2017, a Nor'easter hit New England, covering the region with snow.

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On April 1, 2017, a Nor'easter hit New England, covering the region with snow.

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A Nor'easter forms when warm, moist air traveling north with the Gulf Stream

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collides with cold air moving down from Canada, resulting in snow and rain.

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collides with cold air moving down from Canada, resulting in snow and rain.

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The Global Precipitation Measurement (GPM) mission observed the storm, which dumped

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8 - 14 inches of snow over southern Maine and New Hampshire.

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GPM's radar detected the storm's front as a deep layer of rain that abruptly ended south of 

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Cape Cod. 

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This suggested a strong temperature gradient in the lower atmosphere,

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This suggested a strong temperature gradient in the lower atmosphere,

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which is a key ingredient for strengthening the storm.

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