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| October 2010 Arizona tornado outbreak ： ウィキペディア英語版 |
October 2010 Arizona tornado outbreak
The October 2010 Arizona tornado outbreak was the largest single-day tornado-event in Arizona history, with eight tornadoes touching down. Additionally, a brief tornado touched down in Utah.
==Meteorological synopsis==
On October 5 and 6, 2010, a strong area of low pressure situated off the coast of California produced a southerly flow of warm, moist air into Arizona. Warm surface temperatures and clear skies throughout the day on October 5 allowed for significant instability, resulting in scattered severe thunderstorms during the late afternoon, evening and overnight hours. These storms produced widespread damaging hail, ranging up to in diameter, and hurricane-force wind gusts of . Throughout the Phoenix Metropolitan Area, hail caused considerable damage to hundreds of structures. A tornado watch was issued by the Storm Prediction Center earlier that day. Tornado Warnings were issued during the evening and overnight/early morning hours by the local NWS offices in Phoenix and Flagstaff when strong rotation was visible within the t-storms on radar.
9 confirmed tornadoes were reported by the Flagstaff office of the National Weather Service.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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