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March 2010 nor'easter
The March 2010 nor'easter was a powerful nor'easter that impacted the Northeastern United States and Eastern Canada from March 12–16, 2010, resulting in at least nine deaths. The slow-moving storm produced over of rain in New England, causing widespread flooding of urban and low-lying areas. Winds of up to snapped trees and power lines, resulting in over 1 million homes and businesses left without electricity. The storm also caused extensive coastal flooding and beach erosion.〔(Stubborn Storm Darkens, Floods Northeast, Fox News Channel, Accessed March 16, 2010 )〕 The nor'easter was the fifth major winter storm to impact the Mid-Atlantic and New England in the 2009–10 North American winter storm season.
==Synoptic conditions==
The winter storm that would impact the Northeastern United States evolved when an area of low pressure moved northeastward from Texas to the Great Lakes region on March 10 and 11. A secondary low pressure center developed near Cape Hatteras, North Carolina and drifted northward to a position south of Cape Cod, Massachusetts by March 14. The system contained abundant moisture feeds from the tropical Pacific Ocean and Gulf of Mexico. Unlike the previous three winter storms that affected the region in February, there was a lack of cold air with this system and precipitation with this storm fell primarily as rain.
Light to moderate rain spread north across the entire region through the day on Friday as the low pressure drifted north and slowly strengthened. With a strong fetch off the Atlantic Ocean, rainfall rates became heavy overnight Friday and through the evening of Saturday March 13th, resulting in small stream and eventually major river flooding. Meanwhile a high pressure system anchored in the Canadian Maritimes also strengthened and a very strong pressure gradient developed between these pressure systems overnight Friday. This resulted in strong, damaging easterly winds across much of the area through the day Saturday, especially along the New Jersey coast where minor to moderate coastal flooding also occurred. The strong winds and widespread heavy rains slackened off overnight Saturday as the surface low was stationary across the Delmarva region. Showers and even a few thunderstorms continued to rotate in off of the Atlantic through the day on Sunday March 14th and continued into Monday March 15th as the low slowly moved eastward and finally out to sea by Tuesday morning March 16th.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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