Boston, Massachusetts averages just under 2” of snow for the month of April. Given is proximity to the Atlantic Ocean and the warming effects of the water, big snowstorms in April are uncommon – but not rare. On April 17, 1821 such an uncommon event occurred as a strong storm system slowly lumbered up the eastern seaboard. Cold air held sway over New England, the storm swung northward but was far enough out to sea to prevent the warming effects of a flow of air off the ocean. The big counter-clockwise swirl of winds around the system blew from the north northeast and off the land enforcing cold air from eastern Canada rather than an east flow off the warmer ocean. The result was a foot of snow and the snowstorm prevent the Legislature from opening for several days. The storm also brought 3” of snow in New York City and 16” to Worcester, Massachusetts. Interestingly the 12” of snow in Boston is not the most snow there from a single storm in April, that record belongs to April 1, 1997 when more than 25” blanketed Beantown.
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