Extratropical cyclone generates maximum alert in Rio Grande do Sul and causes winds above 100 km/h in 26 cities

A high severity red alert was issued for 26 municipalities on Rio Grande of Sul due to the approach of an extratropical cyclone, formed between the coast of Rio Grande do Sul and Uruguai. The warning, released by Instituto Nacional of Meteorologia (Inmet), indicated the imminence of winds intense, with gusts that can exceed 100 km/h in the most vulnerable areas of the state.

This meteorological phenomenon represented a significant threat to local infrastructure and the safety of the population. The potential for causing a range of structural damage was high, including falling trees, roofing of buildings and widespread interruptions in electricity supply. Cities located directly on the system’s trajectory were those most exposed to these impacts.

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The southern and coastal regions of Rio Grande do Sul, such as Porto Alegre, Pelotas, Rio Grande and Camaquã, were specifically highlighted as points of greatest attention by the authorities. Além extreme winds, the forecast pointed to heavy and stormy rains, worsening the risk of flooding and urban disruption in several locations.

Alert details and imminent risks

Instituto Nacional of Meteorologia classified the alert as the highest level of severity, indicating a very great risk to the population and infrastructure. Projections indicated that the combination of strong winds and precipitation could lead to complex scenarios, requiring a quick response from civil protection agencies.

The strength of the extratropical cyclone, although with its center positioned over Oceano Atlântico Sul, east of Uruguai, was felt with intensity in a large part of Sul and Brasil. Maritime agitation on the coast of Rio Grande do Sul and the south of Santa Catarina was also a concern, with waves that could reach between 2.5 and 3 meters high, impacting navigation and coastal activities.

Direct impacts on cities in Rio Grande do Sul

Rio Grande Sul southern and coastal cities faced the most severe effects of the cyclone. Despite the winds that caused material destruction, the large volume of rain recorded, exceeding 100 millimeters in 48 hours in some areas, intensified the instability scenario and increased the risk of landslides on slopes and flooding in riverside areas.

Defesa Civil from the state and the affected municipalities implemented contingency plans to mitigate the impacts. Abrigos Temporaries were prepared and rescue teams were on standby to respond to emergencies. The population was advised to follow safety recommendations, such as avoiding risky areas, not taking shelter under trees and unplugging electronic devices.

The interruption in the electricity supply was one of the most immediate and widespread consequences. Milhares of homes and commercial establishments were left without electricity, affecting routine and communication in several communities. Energy concessionaire teams worked intensely to restore service, facing the challenges posed by adverse weather conditions and the extent of the damage.

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Extension of the phenomenon to other regions of the country

Although the main focus was on Rio Grande of Sul, the cold front associated with the cyclone extended and organized areas of instability in other parts of Brasil. Espírito Santo and Minas Gerais were also placed on alert for the possibility of intense rain in the following days.

Minas Gerais regions such as Zona of Mata and Vale of Rio Doce were in the path of potential storms, raising the attention of local authorities. No Centro-West, areas of Goiás and Mato Grosso could also be hit by heavy rain showers, demonstrating the vast scope of interconnected meteorological systems that operate across the national territory.

Prevention actions and recommendations for the population

Given the severity of the warning, authorities issued a series of recommendations for the population to protect themselves and minimize risks. Prevention is the best tool to avoid tragedies and preserve lives in extreme weather events.

Some of the key guidance included:

Community collaboration is essential for an effective response and ensuring safety information reaches everyone. Social networks and messaging applications were also used to disseminate guidance and alerts in real time.

Extratropical cyclones: nature and recurrence

Extratropical cyclones are low atmospheric pressure systems that form outside tropical regions, generally in mid-latitudes. Eles are common on the south coast of Brasil, especially during the colder seasons when polar air masses meet warmer air masses, creating ideal conditions for their development.

These phenomena are characterized by winds that rotate clockwise at Hemisfério Sul and can be accompanied by cold fronts, intense rain and sea disturbances. Forecasting and monitoring these systems are crucial for Defesa Civil, which can anticipate risks and guide the population in advance, minimizing impacts.

The recurrence of these events requires that the coastal regions and the interior of Rio Grande of Sul and Santa Catarina maintain a constant state of alert and that infrastructures are designed to withstand climatic adversities. The continuous preparation of communities and the modernization of warning systems are essential for resilience in the face of these natural challenges.