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November 2006 nor'easter
The November 2006 nor'easter was a powerful extratropical cyclone that formed offshore of the Southeastern United States on November 20, bringing heavy rains, high winds, beach erosion, and coastal flooding to the Carolinas and southern New England. In addition, the earliest snowfall ever noted in both Charleston, South Carolina and Savannah, Georgia occurred on the southwest side of this cyclone. Over 10,000 were without power during the storm. No longer a nor'easter, the extratropical cyclone accelerated rapidly across the North Atlantic while rapidly strengthening, becoming a cyclonic storm again by November 25, but this time with hurricane-force sustained winds. The intense low made a cyclonic loop west of Iceland, before being absorbed by another strengthening extratropical cyclone to the west of Great Britain, late on December 1.
==Meteorological synopsis==
A shortwave moved through the southern stream of the polar jet of the Westerlies, dropping temperatures in its wake across the southeast United States. Cyclogenesis spurred a developing surface cyclone which quickly occluded on November 20. Surface pressure gradient between this cyclone and a sprawling high stretching around its periphery from New England into the Deep South led to strong winds in the Carolinas. he cyclone deepened to a central pressure of before swinging westward into the Outer Banks of North Carolina on November 22. At this time, a trio of upper-level shortwaves were rotating around the main closed cyclone aloft, which spurred development of a new, weaker low pressure center offshore North Carolina. This cyclone was weaker after its interaction with North Carolina until it reached New England, when renewed strengthening led to significant impacts across Long Island and southern New England. The system then began accelerating east-northeast while continuing to slowly strengthen, passing offshore Atlantic Canada on November 24. The cyclone subsequently bombed, or strengthened quite rapidly, and accelerated east-northeast, becoming a hurricane-force storm in the far north Atlantic with a central pressure of by the afternoon of November 25 and peaking at by the morning of November 26.〔Ocean Prediction Center. (Weather Map of the North Atlantic. ) Retrieved at 1408 UTC on 2006-11-26.〕 Slow weakening occurred soon afterward as the system slowed down and turned towards Iceland. By the evening of November 27, its central pressure had increased to while located a couple hundred miles south of Iceland. The cyclone continued to loop cyclonically west of Iceland, absorbing a cyclone along the way as it passed southwest off the southern tip of Greenland, before a developing gale approaching Great Britain absorbed this cyclone late on December 1.〔Ocean Prediction Center. (Unified Surface Analysis: 14 Day Loop. ) Retrieved on 2006-12-09.〕
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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