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NOAA Ranks December Snowstorm a Category 3 on Northeast Snowfall Impact Scale

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Graphic of snowfall accumulation from Dec. 18-21, 2009 storm. Click for larger image

To the surprise of no one affected by the Dec. 18-20, 2009 system that dumped heavy snow from the mid-Atlantic to southern New England, NOAA has rated the storm a Category 3 or “Major” winter storm on NOAA’s Northeast Snowfall Impact Scale, also known as NESIS. Topping the NESIS scale—and the only storms rated Category 5—are the “Superstorm” on March, 1993 followed by the “Blizzard of ’96” in January, 1996. The scale, developed in 2004, catalogues storms dating back to 1888. (More)

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