When we say "weather", they often mean "checkered", "unstable". In temperate latitudes differently and do not happen. But volatility is different.
Weather can change just a few times during the day. And may remain about the same for a week or even a month, and then her character will change dramatically — dry and hot month replaced rainy and cool.
This was the case in the British Isles, when to replace hot sun and record March came a rainy and cool April. The reason for such lengthy weather anomalies are krupnomasshabnye wave in the middle troposphere, where their speed of movement is very small, and they, like, hang over some areas. Jet stream, which describes the profile of a wave passes south of the British Isles, leaving them in a cool, moist air. And the British Isles, and the surrounding waters of the North-East Atlantic has been a long time under the influence of the family of cyclones. Clear high (in the Highlands of wet snow), monthly rainfall was completed and exceeded, even in the south-east of the country, sometimes rains caused flooding.
Weather in the island kingdom, the differences more and more long-term periodicity. Recently, two summers in a row in 2008 and 2009 — have surprised unusually heavy rains, which are several times higher than the norm, and widespread flooding. But the last two winters have been extremely dry. Anglian Water Company stated that the dry period of 18 months were the worst in 100 years. Only in 1892-1893 and 1920-1921, the amount of precipitation was less than in the last 2 years. To drought-stricken regions include 17 counties located in the center and east of the middle part, and the whole south Lincolnshire, Kebridzhshir, Hampshire, East and West Sussex, Kent, London, Surrey, Berkshire, Gertfordshir, Buckinghamshire, Oxfordshire, parts of Bedfordshire , Norgtemptonshira and Yorkshire, West Norfolk and East Gloucestershire. The low level of water in rivers, depleting groundwater reservoirs are empty. Particularly affected the south-east of the country. Authorities fear that the coming winter might be the third driest winter as summer rains may not be able to solve the problem. In a growing population increased demand for water. In this case, meteorologists say that the trajectory of winter cyclones, which bring moisture noticeable shift towards Ireland and Scotland, leaving the south-east of England without rain.
The situation was so serious that the Environment Agency had to ensure strict measures to regulate water flow. The big question is the willingness of some sporting facilities for the upcoming 2012 Olympics in London, not to mention golf courses and cricket. At least four out of ten football stadiums could be the beginning of the Games unusable.
So what is a rainy and cool April — if he can solve the problem of drought? More important for this would be the winter precipitation, areas which are usually extensive. Such precipitation quietly restock water in the soil, rivers and reservoirs. Water after summer showers absorbed less efficiently. Therefore, the problem of the strongest in the last 90 years of drought has not been solved — to overcome its consequences require more prolonged and heavy rains, although they create a lot of problems in the form of floods. Remain in force as long as the measures taken by companies that provide water supply.