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The 1970 Canada hurricane was an unnamed tropical cyclone that brought impact to Bermuda and Newfoundland. The fourth hurricane and ninth tropical storm of the annual hurricane season, this system developed northeast of the Bahamas as a subtropical depression on October 12. While tracking northeastward, the system intensified, becoming a subtropical storm on the following day. The subtropical storm transitioned into a tropical cyclone on October 16, and strengthened into a hurricane about twelve hours later. The hurricane later bypassed Bermuda, before further intensifying into a Category 2 hurricane on the Saffir–Simpson hurricane wind scale. Thereafter, the hurricane accelerated rapidly northeastward, and made landfall on the Avalon Peninsula of Newfoundland as a Category 1 hurricane. It transitioned into an extratropical cyclone early on October 17. The system produced tropical storm force winds on Bermuda, which caused the suspension of schools, transportation, and interrupted businesses, although minimal structural damage occurred. Light rainfall was also reported on the island. Hurricane force winds were observed throughout Newfoundland, which caused damage to structures, though mostly limited to broken windows. Rough seas damaged fishing dories and a fishing ramp on the Atlantic coast of the island. The cost of damage on the Burin Peninsula was estimated to be in the thousands of dollars, although the specific figure in unknown. Heavy rainfall was also reported in the region, with precipitation in Quebec reaching nearly . On the French Territory of Saint Pierre and Miquelon, several buildings and houses lost their roof due to strong winds. == Meteorological history== On October 11, 1970, satellite images indicated that a tropical depression developed north of Hispaniola. However, according to post-analysis, a subtropical depression actually formed on October 12 at 1200 UTC. The depression slowly intensified over the next few days, and became a subtropical storm on October 12, thought this was operationally unnoticed by the National Hurricane Center. By October 13, satellite imagery indicated that convection associated with the depression merged with a weak stationary front. As a result, the National Hurricane Center no longer considered it purely tropical and classified the system as a "subtropic storm" on October 14.〔 Later that day, the National Hurricane Center began issuing special bulletins for the storm, indicating the possibility of the system acquiring tropical characteristics. Early on October 16, satellite imagery indicated that the storm was developing a cloud pattern typical of a normal tropical cyclone. In addition, Reconnaissance aircraft flight data indicated that a warm core was developing.〔 As a result, the system had acquired enough characteristics to be considered a tropical cyclone at 0000 UTC on that day. Later that day, the storm strengthened enough to be upgraded to a hurricane at 1200 UTC. Six hours later, the system passed just west of Bermuda, although winds were well below hurricane force on the island. Spiral cloud bands and an eye feature were observed on radars as the hurricane bypassed the island. The warm core persisted into October 17, which indicated that the hurricane was fully tropical for at least 30–36 hours.〔 Early on October 17, the National Hurricane Center discontinued bulletins on the system, while it was located about northeast of Bermuda. At 0600 UTC on October 17, the system intensified into a Category 2 hurricane on the Saffir–Simpson hurricane wind scale. Six hours later, the hurricane attained its peak intensity with maximum sustained winds of 105 mph (165 km/h) and a minimum barometric pressure of . Although a radio bulletin by the Naval Communications Station Washington, D.C. Transmitter (NSS) at 1200 UTC noted that it had hurricane characteristics, the National Hurricane Center did not name the storm. By 1800 UTC, a cold front began impacting the circulation of the hurricane,〔 which caused the storm to weaken back to a Category 1 hurricane, and began losing its tropical characteristics.〔 At approximately 2330 UTC on October 17, the hurricane made landfall on the Avalon Peninsula of Newfoundland with winds of 80 mph (130 km/h). Only 30 minutes later, the hurricane transitioned into an extratropical cyclone. The remnant extratropical cyclone curved abruptly northward and later re-emerged into the Atlantic, before dissipating on October 20.〔 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「1970 Canada hurricane」の詳細全文を読む スポンサード リンク
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