Unusual clouds

 Let us take a break from winter and talk about summer events. In warm time of the year after the passage of a lightning storm in the sky you can sometimes see a cloud of shapes, reminiscent of the udder. In meteorology videobritney" clouds are called Mammatus and they are one of the varieties of Cumulus clouds with a honeycomb structure. 

 "Videobase" Mammatus clouds are usually located under the "parent" cluster of massive Cumulus or cumulonimbus clouds. Typically, the observer sees Mammatus in the form of gray clouds with darker as if hanging down elements. 

 However, with the low height of the Sun above the horizon (e.g., at sunset) mammatus can buy blue-gray, gray-pink, Golden or reddish color. 

 Because of its sinister appearance "videobase" clouds are often considered the harbingers of an impending storm or hurricane. 

 Mammatus always associated with lightning storms and, therefore, with cumulonimbus clouds. However, these clouds can defend from the storm center at a distance of several tens of kilometers. Mammatus remain in the sky from several minutes to several hours, gradually disappearing with the fading lightning storm. 

 Separate the "petals" of mammatus have diameters of 1-3 km in length in average 0.5 km of the Petal there are an average of 10 minutes, but a whole cluster lives from 15 minutes to several hours. 

 In such circumstances, under the falling ice crystals "anvils" of cumulonimbus clouds there is a system of small ascending and descending air streams in the background of a General downward flow of air. These flows and lead to the formation of the characteristic shape of the clouds. 

 However, lightning storms, producing "videobase" clouds, characterized by high probability of occurrence of ball lightning, and wind shear. Therefore, aircrews must not only avoid cumulonimbus (Cumulonimbus) clouds, but Mammatus. 

 However, the appearance in the sky of Mammatus suggests that the most powerful and dangerous part of the storm has passed. 

 Mammatus can be seen in the middle latitudes of Russia, but rarely. Usually occur in the damped lightning storms in the rear (descending) part of the "anvils". 

 It is the fact that clouds form in descending air movements makes them unique, as is known, haze is formed when updrafts.