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On the 25 of June a series of destructive floods occurred in parts of the United Kingdom during the summer of 2007. The most severe flooding occurred across Northern Ireland on 12 June; East Yorkshire and The Midlands on 15 June; Yorkshire, The Midlands, Gloucestershire, Herefordshire and Worcestershire on 25 June; and Gloucestershire, Herefordshire, Worcestershire, Oxfordshire, Berkshire and South Wales on 28 July. June was one of the wettest months on record in Britain (see List of weather records). Average rainfall across the country was ; more than double the June average. Some areas received a month's worth of precipitation in 24 hours. It was Britain's wettest May–July since records began in 1776. July had unusually unsettled weather and above-average rainfall through the month, peaking on 20 July as an active frontal system dumped more than of rain in southern England. Civil and military〔〔〔〔〔 authorities described the June and July rescue efforts as the biggest in peacetime Britain. The Environment Agency described the July floods as critical and expected them to exceed the 1947 benchmark. ==Meteorological background== June 2007 started quietly with an anticyclone to the north of the United Kingdom maintaining a dry, cool easterly flow. From 10 June the high pressure began to break down as an upper trough moved into the area, triggering thunderstorms that caused flooding in Northern Ireland on 12 June. Later that week, a slow moving area of low pressure from the west of Biscay moved east across the British Isles. At the same time, an associated occluded front moved into Northern England, becoming very active as it did so with the peak rainfall on 15 June. Rainfall records were broken across the region, leading to localised flooding. As it weakened, the front moved north into Scotland on 16 June and left England and Wales with a very unstable airmass, frequent heavy showers, thunderstorms and cloudy conditions. This led to localised flash flooding and prevented significant drying where earlier rains had fallen. On 25 June another unseasonably low pressure (993 hPa / 29.3 inHg) depression moved across England. The associated front settled over Eastern England and dumped more than of rain in places. The combination of high rainfall and high water levels from the earlier rainfall led to extensive flooding across many parts of England and Wales, with the Midlands, Gloucestershire, Worcestershire, South, West and East Yorkshire the most affected. Gales along the east coast also caused storm damage. RAF Fylingdales on the North Yorkshire Moors reported rainfall totals of in 24 hours, an estimated in Hull and on Emley Moor in West Yorkshire. Until 2007, the average monthly total for June for the whole UK was . On 27 June, the Met Office released an early warning of severe weather for the approaching weekend, stating that of rain could fall in some areas, raising the possibility of more flooding within the already saturated flood plains. On 20 July, another active frontal system moved across Southern England. Many places recorded a month's rainfall or more in one day. The Met Office at RAF Brize Norton in Oxfordshire reported : a sixth of its annual rainfall. The college at Pershore in Worcestershire reported , causing the Environment Agency to issue 16 further severe flood warnings. By 21 July, many towns and villages were flooded, with Gloucestershire, Worcestershire, Warwickshire, Wiltshire, Oxfordshire, Berkshire, London and South Wales facing the brunt of the heavy rainfall. Climate researchers have suggested that the unusual weather leading to the floods may be linked to this year's appearance of La Nina in the Pacific Ocean,〔(Four more days to pump flood water from homes in Doncaster ) ''London Evening Standard''. Retrieved 3 July 2007.〕 and the jet stream being further south than normal. 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「2007 United Kingdom floods」の詳細全文を読む スポンサード リンク
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