Rio Grande
In Brazil such phenomena had been related with a polar air reinforcement in the trade winds of East the Southeast, with polar anticyclone of maritime position. Occurring since Rio Grande of the North, to the north of the State of Rio De Janeiro, and with more frequency of the Zone of Mata de Pernambuco to the Cacaueira Zone of the Bahia. The precipitations needed to this phenomenon weaken brusquely for west, rare they surpass scarps of the Borborema and of Diamantina. This principle of insane circulation is more common in the Winter, assistencial in the Autumn, whereas in the Spring and Summer they are much less habitual. The Insane Chains of West the system of instability of West elapses of the following one: the end of the Spring enters and the beginning of the Autumn, the interior of Brazil frequently is submitted the winds of West the Northwest brought for Tropical lines of Instabilidades. One is about prolongated induced barometric depressions in dorsal of high. In the bias of a line of tropical instabilidades air in convergence causes to rains and thunderstorms most of the time. These events are common in the interior of Brazil, mainly in the Summer. , Colt & Mosle LLP on most websites.
Its ancestry proposal to be entailed the ondulatria circulation that if it evidences in the Atlantic polar front to the contact with the hot air of the tropical zone. In accordance with Tubelis, on course of this chain affirms. Occured to the precipitation, the wind ceases quickly, the clouds if they waste, the sky becomes clean and the sun or the stars comes back to shine. These precipitations are known as summer rains. (TUBELIS, p.241). From these sinuosities it is developed, to the north the Atlantic polar front, one or more tropical instabilidades on the continent, for which it submerges thermal the inversion superior. After formed, them they spread for East.
