A new unusual weather pattern is forecast to occur in South America this November due to the combination of a large mass of hot air and the late arrival of polar air from southern Argentina. With the arrival of this phenomenon, heavy rains, areas of low pressure and storms are expected, as reported by MetSul Meteorologia.
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Thus, the most affected region will be the transition area between the colder air from Argentina and the warm air from Brazil. As a result, the south of Brazil, mainly the states of Rio Grande do Sul and Santa Catarina, should feel the effects. New episodes of storms are expected, with areas of low pressure and cold fronts, increasing rainfall to levels above the historical average.
Some cities in Rio Grande do Sul may end the month of November with
rains between 300 mm and 500 mm, after the last two months were very rainy. According to the weather forecast, the next ten days will see rainfall between 100 mm and 200 mm in some municipalities in the west and south of Rio Grande do Sul.Even though this phenomenon is common in winter, its occurrence in November is atypical. At this time of year, rain is more associated with heat and humidity, not due to the influence of cold fronts or low pressure. However, the thermal contrast between hot and cold air masses will generate instabilities this November.
As the thermal contrast persists in the region, intense rains and storms will continue in southern Brazil. Furthermore, another consequence is the absence of long periods of heat in Rio Grande do Sul, which will result in a milder climate than expected for this season. station of the year.