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2006 Westchester County tornado
The 2006 Westchester County tornado was the strongest and largest tornado in the history of Westchester County, New York.〔 It touched down there on July 12, 2006 and traveled into southwestern Connecticut during a 33-minute span through two states. The tornado touched down at 3:30 p.m. EDT (19:30 UTC) on the shore of the Hudson River before becoming a waterspout and traveling across the river. Coming ashore, the tornado entered Westchester County and struck the town of Sleepy Hollow at F1 intensity. After passing through the town, it intensified into an F2 tornado and grew to almost a quarter of a mile (400 m) in diameter.〔 The tornado continued through the county, damaging numerous structures, until it crossed into Connecticut at 4:01 p.m. EDT (20:01 UTC). Not long after entering the state, it dissipated in the town of Greenwich at 4:03 p.m. EDT (20:03 UTC).〔 When the tornado entered Westchester County, it was the eighth known tornado to either touch down or enter the county since 1950.
Two barns and a warehouse were destroyed, and a large stained-glass window was shattered. Numerous homes and businesses were damaged and thousands of trees were uprooted. There were no fatalities and only six minor injuries were associated with the storm. The cost of damages was estimated at $12.1 million.
==Meteorological synopsis==
On July 12 a supercell thunderstorm developed over eastern New Jersey in association with a surface low-pressure area in southwestern Ontario. Daytime heating in the Tri-State Region led to moderate instability, a key factor in the development of showers and thunderstorms. With conditions favorable for the development of a tornado, the Storm Prediction Center issued a tornado watch at 12:40 p.m. EDT (16:40 UTC). A strong thunderstorm developed around 2:00 p.m. EDT (18:00 UTC) which produced a funnel cloud near Carlstadt at around 2:45 p.m. EDT (18:45 UTC), although no damage was associated with the funnel. That same storm intensified and developed into a supercell as it crossed into New York.〔 About 15 minutes later, a tornado warning was issued for southern Rockland and Westchester counties which would remain in effect until 4:15 p.m. EDT (21:15 UTC).〔 〕 At around 3:30 p.m. EDT (19:30 UTC), an F1 tornado touched down near Grand View-on-Hudson along the Hudson River in Rockland County. The 100 yard (91 m) wide tornado touched down on a dock before becoming a waterspout as it took a path across the river. The tornado passed near the Tappan Zee Bridge before crossing into Westchester County. Upon entering Westchester, it was the eighth tornado ever recorded in the county.〔
The tornado hit the town of Sleepy Hollow, New York, around 3:37 p.m. EDT (19:37 UTC); two minutes later, a wind gust was reported along the periphery of the tornado. As the tornado neared New York State Route 9A, it intensified to F2 status, generating winds up to , and struck the California Closet Warehouse. At the time, the tornado was estimated to be 300 yd (274 m) wide〔 and was the strongest tornado ever recorded in Westchester County. Shortly after, it weakened back to F1 intensity. Minor damage was reported through the Kensico Reservoir in Valhalla as the tornado neared the New York–Connecticut border. The track length through Westchester County was measured at around . After crossing the state border into Fairfield County, Connecticut, it weakened further before lifting at 4:03 p.m EDT (20:03 UTC) in Greenwich after traveling in Connecticut. Another brief touchdown may have occurred shortly after near the Merritt Parkway. Overall, the tornado tracked across a total of through two states over a period over 33 minutes.
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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