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The Great Coastal Gale of 2007 was a series of three powerful Pacific storms that affected the U.S. states of Oregon and Washington and the Canadian province of British Columbia between December 1, 2007 and December 4, 2007. The storms on December 2 and 3 produced an extreme long-duration wind event with hurricane-force wind gusts of up to at Holy Cross, Washington on the Washington Coast, and at Bay City, Oregon on the Oregon Coast.〔(【引用サイトリンク】title=Oregon Coast Damage 'Worse Than Columbus Day Storm' )〕 The storm also brought heavy rains and produced widespread record flooding throughout the region, and was blamed for at least 18 deaths. Meteorologists at the Oregon Climate Service named the storm in January 2008, drawing from the Great Gale of 1880, a similar powerful storm that affected the region in 1880.〔 〕 ==Meteorological synopsis== On November 29, 2007, a strong low pressure system, fed by the remnants of Typhoon Mitag and Typhoon Hagibis, formed in the central Pacific Ocean, and was carried via the Pineapple Express to the Pacific Northwest. Anticipating the storm, the National Weather Service issued its first-ever hurricane-force wind warning for the Oregon coast. The first of the three separate storms arrived on December 1, accompanying frigid temperatures across much of Washington which resulted in many areas across Washington receiving up to of snowfall. On December 2, the second storm, which provided considerable amounts of rainfall, yet still packing cold temperatures, dumped even more snow across parts of the state, resulting in several districts in Mason County and Kitsap County to close due to heavy snow. At around 5:30 in the afternoon, the snow began to cease, and turned into a light rain across Washington. On December 2, the second storm made landfall on the Oregon coast, with the hurricane-force winds that were forecast, along with tropically-affected temperatures. In as little as two hours, temperatures across the region jumped from near freezing to above 60 degrees in areas just as the first bands of the heavy rain were hitting. The storm moved northward through Oregon and Washington with strong rain (including in 24 hours in Bremerton, Washington.〔) accompanying the wind. The rapid rise in temperature caused the recent snow to melt quickly, indicating that record flooding was imminent across much of the region. Flood warnings across five rivers in Washington were issued late in the afternoon, well before any started to rise (by the 11 p.m. nightly newscasts in Seattle, the flood warnings were updated to include every mountain-fed river in the state). The Skokomish River was the first to hit flood stage at 2:45 a.m. on December 3,〔(USGS Real-Time Water Data for USGS 12061500 SKOKOMISH RIVER NEAR POTLATCH, WA )〕 as drenching rains were still pelting the area. Other rivers in the state began to flood their banks at around the same time, and images of widespread flooding began showing up on the morning newscasts of every Seattle and Portland TV station. By the morning of December 3, extreme wind speeds by the third and most powerful Pacific storm began hitting much of the WA and OR coasts with widespread peak gusts of at official NWS weather stations as well as unofficial stations and those run by Skywarn weather spotters. Locations which had gusts over included Naselle Ridge, Bay Center, Long Beach and Cape Disappointment in Washington and Bay City, Lincoln City, Cape Meares, Cape Blanco, Rockaway Beach and Tillamook in Oregon. Wind gusts up to extended southward into extreme northern California.〔 These winds were highly centralized along the coastal sections. While Hoquiam, Washington's Bowerman Field Automated Surface Observation System was reporting winds of before it was knocked out of service, the ASOS at Olympia airport, to the east, was largely reporting calm winds. Many coastal residents did not receive warning of the severity of the wind event until after it had already commenced, illuminating a disconnect between Puget Sound (Seattle) television stations and the rural coast. Instead, the television stations focused much of their coverage on severe flooding in Southwest Washington. The storm moved into British Columbia, which received heavy amounts of snow due to a previous low including the coastal sections including Vancouver, New Westminster, Surrey and Delta where snow is a rare occurrence even during the winter. The storm later weakened across the Canadian Rockies towards central Alberta and traveled through the Midwest and Middle Atlantic States on December 4–5, where light snow fell in Edmonton, Minneapolis-St. Paul, Madison, Milwaukee, Chicago, Indianapolis, Cincinnati and most of the Ohio Valley. Reports of 4 to 8 inches of snow were widespread throughout the area,〔(NWS Milwaukee/Sullivan, WI ), (NWS Chicago, IL -- Regional Temperature and Precipitation )〕〔(Yesterday's Snow Totals Add to a Snowy December Start )〕 with a high amount of 18 inches (457 mm) of lake-effect snow recorded near Duluth, Minnesota.〔(December 4 Snowfall Maps and Totals )〕〔(The Dickinson Press )〕 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「Great Coastal Gale of 2007」の詳細全文を読む スポンサード リンク
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