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January 2015 North American blizzard
The January 2015 North American blizzard, also unofficially named Winter Storm Juno〔〔 was a powerful nor'easter (a type of winter storm) that affected Canada and the Central and Eastern United States, and eventually, parts of Southern Greenland and Western Europe. The system was part of the 2014–15 North American winter. The nor'easter disrupted transportation, with snow emergencies declared in six states and travel bans enacted in four of these states – Connecticut, New Jersey, Massachusetts, and Rhode Island – as well as in New York City. Most passenger rail service was suspended, and thousands of flights were cancelled.〔〔 Schools and activities saw weather-related cancellations for one or more days.
==Meteorological history==
On January 23, a low-pressure area developed off the Pacific Northwest,〔 before moving over the Canadian Prairies by January 24. The storm system quickly moved southeastward into the Upper Midwest during the evening of January 24, taking a path typical of an Alberta clipper. As it progressed southward, the storm intensified, with frontogenesis occurring the next day. By noon on January 25, the upper-level low was centered near the border between Iowa and Missouri in correlation with a weak shortwave trough. Moisture from the Gulf of Mexico wrapped around the system from the south, resulting in widespread rainfall and snow over the Midwest. Throughout the day, the system traversed eastward along the Kentucky-Tennessee border. Snowfall remained concentrated along a cold front north of the Ohio River.
At 09:00 UTC on January 26, the Weather Prediction Center began issuing storm summaries on the developing disturbance while the low-pressure system was centered near Bluefield, West Virginia. At the time, mixed precipitation was occurring over northern Appalachia. As this system tracked eastward, it gradually weakened; however, at the same time, a new low-pressure system formed off the coast of North Carolina and began to track north-northeastward, eventually becoming the dominant low of the storm. Early on January 30, the nor'easter left the East Coast, even as another winter storm began to impact the region.〔(【引用サイトリンク】title=Winter Storm Kari Blankets Snow-Weary New England )〕 During the next day, the former nor'easter continued to accelerate eastward across the North Atlantic, even as it rapidly weakened. On January 31, the winter storm was absorbed by a much more powerful extratropical cyclone developing over Western Europe.
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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