Bomb cyclone threatens southern Brazil
As a low-pressure system moves over northern Argentina and Paraguay beginning this Thursday (Aug. 6), it may develop into an extratropical cyclone with explosive intensification, known as a bomb cyclone. This is also expected to occur as the system moves through the region between Uruguay and the coast of Rio Grande do Sul, Brazil. Notícias relacionadas: Brazil to see up to 127 days of extreme…
A low-pressure system is set to move over northern Argentina and Paraguay starting Thursday, potentially evolving into a bomb cyclone, a type of extratropical cyclone characterized by explosive intensification. This phenomenon is anticipated to unfold as the system traverses the region bordering Uruguay and the Brazilian coastline in Rio Grande do Sul. The National Institute of Meteorology (INMET) predicts this may transpire from Thursday through Saturday.
Micael Cecchini, an astronomer at the University of São Paulo's Institute of Astronomy, Geophysics, and Atmospheric Sciences, clarifies that a low-pressure system materializes when a dense mass of cold air encounters a warmer air mass, triggering a sharp decline in atmospheric pressure. For a storm to be categorized as a bomb cyclone, it must witness a pressure drop of at least 24 hPa (millibars) within a 24-hour timeframe.
This condition results in heightened atmospheric pressure and a more pronounced temperature differential, leading to the development of storms along the boundary separating the air masses. The denser cold air mass forces itself beneath the warmer air mass, prompting the latter to ascend. This upward movement culminates in cloud formation and storm development. The larger the temperature disparity, the more intense the resulting updraft.
The National Institute of Meteorology anticipates that this forecast will manifest from Thursday to Saturday, with the strongest winds projected to envelop the Atlantic Ocean, potentially surpassing 100 kilometers per hour. Along the coasts of Rio Grande do Sul and Santa Catarina, gusts exceeding 60 km/h are expected. As the cyclone proceeds southeastward away from the coast, a corresponding cold front is projected to advance across Argentina and southern Brazil.
Written by urgent.news from Agencia Brasil's reporting — not their text. Machine-written — it may contain errors, so check the original before relying on it.
