A low pressure system began to intensify between Argentina and Uruguai from Wednesday (6) and is expected to generate an extratropical cyclone with rapid development during the weekend. Apesar does not directly reach Brazilian territory, the phenomenon drives an intense cold front that advances over the country, bringing intense rain and strong winds. The advancement of this instability should cause severe impacts on Sul from Thursday (7).
Low pressure Sistema gains strength over the weekend
Entre Friday (8) and Saturday (9), the system gains strength and moves towards the Atlântico ocean, moving away from the continent. Meteored predicts that during the weekend the increase in cloudiness and rain showers in neighboring countries will give rise to the extratropical cyclone. The rapid development of the structure enhances the energy of the phenomenon and expands its zone of influence. Essa intensification creates the necessary conditions for the associated cold front to forcefully penetrate Brasil.
Intense Chuvas and winds of up to 100 km/h are expected to hit Sul
The “Cyclone Bomba” is expected to cause intense rain in Rio Grande of Sul between the afternoon and evening of Thursday (7). On the coast of Rio Grande, Sul and Santa Catarina, wind gusts can reach 80 km/h. Inland, during the passage of the cold front, winds can reach up to 90 km/h. Há possibility of gusts of up to 100 km/h, especially on Friday (8), which could cause trees, signs and structures to fall.
Accumulated rainfall can exceed 200 millimeters in Paraná and Mato Grosso of Sul, increasing the risk of flooding, river overflows and landslides. Esses Significant volumes of precipitation in a short space of time require special attention from civil defense authorities. Regiões with rugged terrain faces an even greater risk of natural disasters associated with the climate event.
System Progressão affects different states
- Quinta Friday (7): Rio Grande from Sul, with heavy rain forecast
- Sexta Friday (8): instability advances to Santa Catarina, Paraná, Mato Grosso of Sul and areas to the west and south of São Paulo
- Sábado (9) and Sunday (10): the system loses strength, but maintains rain and clouds in Paraná, Santa Catarina, Mato Grosso of Sul and São Paulo
The temporal sequence of the advance allows municipalities to have advance notice to activate protection protocols. Cada state will receive the most intense effects in a specific window, which allows for better resource mobilization. Forecasts indicate that Sunday (10) marks the beginning of the cooling of the most severe impacts.
Medidas Security Recommended by Defesa Civil
Defesa Civil advises avoiding risk areas during periods of intense rain and not crossing flooded roads. Também It is important to pay attention on slopes to identify signs of landslides. In case of strong winds, the recommendation is not to park vehicles near trees, signs and tall structures. Evitar remaining in exposed locations is essential to reduce risks during system passage.
Moradores must reinforce the fixation of loose structures in homes and commercial establishments. Preventative removal of objects that could become projectiles significantly reduces damage. Famílias in areas at risk of landslides must be prepared for quick evacuation if necessary.
What characterizes a “Bomba Cyclone”
The “Bomba Cyclone” is characterized by the rapid intensification of a low pressure system, which increases its impacts. The accelerated drop in atmospheric pressure generates vigorous circulation of winds and more efficient rain formation mechanisms. Esse process concentrates considerable energy in a short period of time. The forecast may still undergo adjustments, but the scenario requires constant monitoring due to the risk of severe weather events in Sul and in part of Centro-Oeste and Sudeste of Brasil.