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| May 1–2, 2008 tornado outbreak ： ウィキペディア英語版 |
May 1–2, 2008 tornado outbreak
The May 1–2, 2008, tornado outbreak was a tornado outbreak that took place across the Southern and Central United States on May 1 and May 2, 2008. The outbreak was responsible for at least seven fatalities (six from tornadoes) and 23 injuries in Arkansas.〔 〕 There were at least 29 tornado reports from Iowa to Oklahoma on May 1 and 67 more in Arkansas, Missouri, Mississippi, Tennessee, Louisiana and Texas on May 2. At least 63 tornadoes were confirmed by weather authorities.
==Meteorological synopsis==
On May 1, 2008, a large low pressure system developed over Nebraska, with a long warm front stretching east towards the Great Lakes. A cold front and dry line were situated across Oklahoma and Kansas during the late afternoon. The Storm Prediction Center (SPC) issued a moderate risk of severe weather for eastern Kansas and a small part of Missouri, which included Kansas City. On May 2 another moderate risk of severe weather was issued by the SPC from Central Illinois to northern Louisiana. The risk area was later revised southward to only include eastern Arkansas, western Tennessee, and northwestern Mississippi. Most of the severe weather shifted into Arkansas where dewpoints were near with CAPE values over 2000 j/kg (in some places up to 3000 j/kg) and helicity values (potential for rotating winds) were exceeding 200 m2/s2.
While most of the severe activity was situated across the southern states, tornado watches were also issued for portions of southern Wisconsin, southern Michigan and northern Indiana as activity developed near the center of the low. No tornadoes were reported in this watch area.〔
On the northern fringes of the storm system heavy snow fell across northeastern Wyoming and western South Dakota. The town of Lead, South Dakota received a total of 54.5 inches, or about of snow from April 30 to May 2. Several other areas received one – four feet (30 – 120 cm) of snow.
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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