![]() (This differed from the North American blizzard of 2009, of "Miller Type A" cyclogenesis where a storm center develops over the eastern Gulf of Mexico and strengthens while tracking north to a latitude of greater temperature contrast.) This storm was carrying an enormous amount of moisture drawn from both the Gulf of Mexico (as seen on February 3 satellite imagery over Mexico), and from the Atlantic (as seen in radar imagery from early on February 5). Easterly winds and onshore flow contributed to light snow accumulations of less than one inch in Boston, Cape Cod, and parts of coastal Rhode Island.Īccording to the blog of Weather Channel senior meteorologist Stu Ostro, the storm formed from "Miller Type B" cyclogenesis: a storm centered over the Ohio river runs into a blocking ridge and redevelops along the Carolina coast. Upstate New York and New England were spared from this system, receiving little more than isolated snow flurries in southern sections. Only moderate accumulations reached the southern suburbs of New York City, with no more than light snow falling in the city itself. The blocking pattern was reflected on the storm's snowfall map by a sharp northern gradient in northern New Jersey and by the axis of heaviest snow running WNW-ESE through Maryland and Delaware (opposed to the SW-NE pattern found from most Nor'Easters). Instead, during the AM hours of February 6th, the storm center slowed its northeasterly movement as it continued to deepen east of Virginia Beach, before it eventually was forced eastward. Meteorological history Īn antecedent and nearly-stationary upper-level ridge over the Maritime Provinces of Canada served to block the storm system from following the traditional northeast track into New England. ![]() Additionally, this event was the second of three major Mid-Atlantic snowstorms that occurred over a 12-day period each subsequent storm focused its heaviest snow slightly farther north: the January 30, 2010, storm (not recognized by NESIS) dropped more than a foot of snow across Virginia and the lower Chesapeake Bay region, while the February 9–10, 2010 North American blizzard bulls-eyed the Maryland-Pennsylvania border with as much as 38.3 inches. The first and third of these systems, the December 2009 Nor'Easter and the February 9–10, 2010 North American blizzard, respectively, combined with this event to bring the snowiest winter on record to much of the Mid-Atlantic. This event was the second of four nor'easters during the 2009–2010 winter that brought heavy snow to enough of the Northeast's population to be numerically recognized by NOAA's NESIS intensity rating. Blizzard conditions were reported in a relatively small area of Maryland, but near-blizzard conditions occurred across much of the Mid-Atlantic region. and Boston was available with limited service. was suspended, and rail travel between D.C. Rail service south and west of Washington, D.C. Most crippling was the widespread 20 to 35 in (50 to 90 cm) of snow accumulated across southern Pennsylvania, the Eastern Panhandle of West Virginia, northern Virginia, Washington, D.C., Maryland, Delaware, and South Jersey, bringing air and interstate highway travel to a halt. Severe weather, including extensive flooding and landslides in Mexico, and historic snowfall totals in every one of the Mid-Atlantic states, brought deaths to Mexico, New Mexico, Virginia, Pennsylvania, and Maryland. ![]() Effects were felt to the north and west of this track in northern Mexico, California, and the southwestern, midwestern, southeastern, and most notably Mid-Atlantic states. The storm's center tracked from Baja California Sur on February 2, 2010, to the east coast on February 6, 2010, before heading east out into the Atlantic. The February 5–6, 2010 North American blizzard, commonly referred to as Snowmageddon, was a blizzard that had major and widespread impact in the Northeastern United States. Part of the 2009–10 North American winter
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