|
The 2009 Pacific Northwest heat wave was a heat wave that affected the Pacific Northwest region of the United States and Canada in late July 2009, particularly areas west of the Cascade Mountains in British Columbia, Oregon and Washington. The heat wave set many new heat records across the area, and broke the previous all-time record high temperature in Seattle by three Fahrenheit degrees (1.7 Celsius degrees). Because the temperatures reached in the heat wave are rare in the Pacific Northwest, few residents own air conditioners. == Weather == Temperatures soared to record highs in late July from Medford, Oregon to Seattle, Washington, and as far north as the Northwest Territories in Canada. The hottest weather occurred from July 26 to August 2, with the peak of the heat from July 28 to July 30. The high of at Seattle-Tacoma International Airport on July 29 set the record for the hottest temperature ever in Seattle since records began in 1894, breaking the old record of set on July 16, 1941 when the official weather station was located in downtown Seattle, and tied on July 20, 1994 at Seattle-Tacoma International Airport. Nighttime low temperatures were unusually high as well — in the upper 60s and lower 70s °F (about 21 °C). The morning of July 29, Seattle also set a new record warmest low temperature, , breaking the old record of set on September 2, 1974 and tied a day earlier on July 28, 2009. The heat was not confined to Seattle. Portland International Airport in Oregon reached on two consecutive days on July 28 and 29, nearly tying the all-time record there of . Portland tied its warmest low temperature on record with a low of on July 28. While the neighboring city of Vancouver, Washington, tied its all-time record high temperature of on July 29. Record temperatures were also recorded across the border in British Columbia where Vancouver International Airport saw two all time temperature records fall on July 29 and 30 when temperatures of and were recorded respectively. Abbotsford, British Columbia in the Fraser Valley saw an all-time high when the temperature hit on July 29. Vancouver Island also saw record temperatures which included Port Alberni reaching , Comox also saw a 48-year-old record fall when the temperature reached . The heat was part of a summer that was overall very warm in the Northwest. Seattle recorded its second warmest July on record with an average temperature of , trailing only July 1941 (average temperature of ), and the third warmest month on record, trailing July 1941 and August 1967 (average temperature of ). The June 1 to July 31 time period was the warmest on record in Seattle with an average temperature of , besting the previous warmest June/July period of 1958 (average temperature of ). 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「2009 Pacific Northwest heat wave」の詳細全文を読む スポンサード リンク
|