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Hurricane Dean was the fourth named storm and second hurricane of the 1989 Atlantic hurricane season. Dean formed on July 31 and reached tropical storm status the following day east of the Leeward Islands. Dean brushed the northern Leeward Islands as a Category 1 hurricane on the Saffir–Simpson Hurricane Scale, bringing light rain but producing no damage, before turning northward and striking Bermuda as a Category 2 hurricane. Dean continued northward before making landfall in southeastern Newfoundland. Since Dean was initially difficult to forecast, it posed a possible threat to the Lesser Antilles, as a result, several evacuations occurred, and many hurricane watches and warning were issued. However, as Dean turned northward, all watches and warnings in the Lesser Antilles were discontinued. As Dean approached Bermuda, a hurricane watch was issued, and was later upgraded to a hurricane warning. After Dean tracked away from the island, the hurricane warning was discontinued. In addition, a hurricane warning was briefly in effect for Sable Island, Nova Scotia. The storm left $8.9 million (1989 USD, $ USD) and sixteen injuries across Bermuda, but no fatalities were reported. In Atlantic Canada, Dean dropped light rain across Nova Scotia and Sable Island. ==Meteorological history== A tropical wave moved off the coast of Africa on July 27 as detected by Meteosat imagery. By July 31 the tropical wave began being classified, using the Dvorak Technique, by satellite analysts at the National Hurricane Center, in part due to persistent deep convection. Shortly thereafter the system organized enough that the National Hurricane Center began classifying it as Tropical Depression Five, roughly halfway between Cape Verde and the Lesser Antilles. The depression moved westward at 17 mph (28 km/h), intensifying as it did so, and eventually intensified enough to be upgraded to a tropical storm, which was named ''Dean'' by the National Hurricane Center.〔 Continuing generally westward, Dean continued to gradually intensify and became a hurricane on August 2 after an Air Force reconnaissance flight had recorded hurricane force winds. The following day a decreasing ridge of high pressure to the north and a trough of low pressure forming off the East Coast of the United States caused Dean to slow in its forward motion and turn northwest. The trough of low pressure forming off the East Coast of the United States was deepening, causing Dean to curve northward while remaining nearly stationary. After remaining nearly stationary, Dean began to accelerate to a forward speed of 17 mph (28 km/h) as it headed toward Bermuda. Thereafter, Dean intensified into a Category 2 hurricane, whilst the eastern half of the eyewall brushed Bermuda. Dean continued to intensify slightly after passing the island of Bermuda and became a Category 2 hurricane on August 7. While Dean was a Category 2 hurricane, it attained its peak intensity with winds of 105 mph (165 km/h) and a minimum pressure of 968 mbar (hPa; 28.59 inHg). After peak intensity, the forward speed of Dean continued to increase as it approached Atlantic Canada while weakening back to a Category 1 hurricane. While approaching southern Newfoundland, Dean had weakened enough to be downgraded to a tropical storm on August 8. Shortly thereafter, Dean then made landfall on the south coast of Newfoundland with winds of 65 mph (105 km/h). Later that day, Dean emerged into the far north Atlantic and rapidly transitioned into an extratropical cyclone on the following day.〔 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 Dean (1989)」の詳細全文を読む スポンサード リンク
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