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Hurricane Michael of the 2000 Atlantic hurricane season caused moderate damage in Atlantic Canada. The seventeenth tropical cyclone, thirteenth named storm, and eighth hurricane of the season, Michael developed from a non-tropical system to the southwest of Bermuda on October 15. The system was initially subtropical, but rapidly acquired tropical characteristics by October 17. Michael quickly strengthened into a hurricane later that day. By October 20, Michael peaked as a Category 2 hurricane on the Saffir-Simpson hurricane wind scale at a relatively high altitude of 44°N. The storm weakened slightly to a Category 1 hurricane and became extratropical shortly before making landfall in Newfoundland on October 20. As the intensity of Michael was equivalent to a Category 1 hurricane during landfall, high winds were reported throughout Atlantic Canada, especially in Newfoundland. Winds from the storm peaked at in St. Lawrence, Newfoundland; other locations across the island reported winds of . High winds caused minor structure damage across Newfoundland, confined to vinyl siding peeled off, shattered windows, and unroofed houses. In addition, sporadic power outages were also reported from Corner Brook to St. John's. Michael also dropped rainfall across Atlantic Canada and in Maine. The rainfall was generally light, with much of the region reporting between of precipitation. Michael also produced high tides, accompanied by waves reported as high as by a buoy well offshore of Newfoundland. ==Meteorological history== The system originated out of a non-tropical cold-core upper level low that drifted southward into the subtropics. The low interacted with a cold front, which resulted in the development of a stationary front over the Bahamas on October 10. As the cold low drifted southward, a surface low developed on October 12. The surface low remained mostly stationary until early on October 15 as it merged with the upper-level low and deepened while north of the Bahamas and east of the coast of Florida. Later that day, the system gained enough tropical characteristics and became organized enough to be classified as a subtropical depression. The storm remained stationary over warm water, with sea surface temperatures around , while it continued to gain additional tropical characteristics. Around 0000 UTC on October 16, it strengthened into a subtropical storm after satellite classifications showed a stronger storm. Later that day, the cyclone continued to develop as more thunderstorms formed and persisted near the low-level circulation.〔 By 0000 UTC on October 17, the transition was completed and Michael was reclassified as a tropical storm as supported by satellite classifications via the Dvorak technique.〔 Shortly thereafter, the National Hurricane Center initiated advisories on Tropical Depression Seventeen; post-analysis later discovered it was actually a tropical storm.〔 A well-defined eye quickly developed early on October 17 as Michael began to strengthen and continued to organize. That afternoon, Michael rapidly intensified further and was upgraded to a hurricane as Reconnaissance flights found winds of . At that point, Michael began to move northward. While Michael was maintaining minimal hurricane status, the eye remained ragged, yet well-defined. Early on October 19, Michael briefly strengthened to 135 km/h (85 mph) before weakening slightly six hours later. Tracking into cooler water, Michael began its extratropical transition while accelerating to the northeast towards Newfoundland, which prevented significant weakening. The acceleration was caused by a shortwave trough embedded within strong southwesterly mid-level flow.〔 Unexpectedly, Michael began to rapidly intensify on October 19 while in extratropical transition. Later that day, a ship report in the eastern eyewall reported a minimum central pressure of and maximum sustained winds of 160 km/h (100 mph), making Michael a Category 2 hurricane on the Saffir-Simpson hurricane scale. The sudden intensification was determined to have been as a result of baroclinic effects as it interacted with an incoming trough, which provided additional energy to counter the general weakening of hurricanes while in the high latitudes over sea-surface temperatures around .〔 Michael formed a "hybrid" system combining influences of a hurricane with that of a powerful extratropical cyclone.〔 Shortly before 0000 UTC on October 20, Michael made landfall near Harbour Breton, Newfoundland with winds of 135 km/h (85 mph). Either simultaneously or shortly thereafter, Michael transitioned into an extratropical storm.〔 The extratropical system gradually weakened as it tracked across Newfoundland on October 20, and slowed down considerably with the presence of the trough. The storm was absorbed by another extratropical low just north of Newfoundland that afternoon.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hurricane Michael (2000)」の詳細全文を読む スポンサード リンク
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