Metsul warns of an intense extratropical cyclone in the South Atlantic with rain, winds above 100 km/h, and the advance of a cold air mass over Southern Brazil, dropping temperatures to as low as 5°C in Rio Grande do Sul and Santa Catarina.

Written by Carla Teles

Published on 25/04/2026 at 18:33

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Metsul warns that the cyclone begins to form this Saturday in the South Atlantic and is expected to bring rain, winds above 100 km/h, and a cold air mass to Rio Grande do Sul in the coming days.

The Metsul Meteorology alert released this Saturday, April 25, draws attention to the formation of an intense extratropical cyclone in the coming days in the South Atlantic. According to the forecast, the system will bring rain, winds above 100 km/h, and a cold air mass that should reach Brazil, concentrating the most significant effects in the South Region.

What makes the scenario more relevant is the combination of different impacts in sequence. The cyclone begins to organize in the Argentine Patagonia coast region, then spreads to the Rio de la Plata Estuary and advances through Argentine and Uruguayan territory until Monday. As a result, a corridor of cold air is expected to push the cold into Southern Brazil, with minimum temperatures between 5°C and 10°C in several cities in Rio Grande do Sul starting Sunday, April 27, with impacts also felt in Santa Catarina.

How the cyclone will form and advance in the coming days

According to Metsul, the cyclone begins to form this Saturday in the Argentine Patagonia coast region. Subsequently, the system will spread to the Rio de la Plata Estuary and advance over areas of Argentina and Uruguay until Monday.

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The numbers that explain the scale of the alert

The data cited in the alert help to gauge the impact of the cyclone. Metsul indicates winds above 100 km/h associated with the phenomenon in the South Atlantic, in addition to winds that could reach 90 km/h on the coast of Rio Grande do Sul and Santa Catarina during the week.

Regarding temperature, the highlight is the advance of cold air starting Sunday, April 27. In Rio Grande do Sul, the forecast indicates minimums between 5°C and 10°C in several cities. The same cold conditions are also expected to be felt in Santa Catarina, reinforcing the regional scope of the weather change.

What changes in practice for Southern Brazil

In practice, the alert shows that the cyclone should not only be perceived in the ocean or outside the country. The effects advance towards Southern Brazil with a direct impact on daily life, mainly due to the combination of rain, strong winds, and cold air.

For Rio Grande do Sul and Santa Catarina, this means a week marked by increased attention to weather conditions, especially in coastal areas, where winds can reach up to 90 km/h. At the same time, the advance of the cold air mass tends to drop temperatures more significantly, especially from Sunday onwards.

Why this cyclone draws so much attention

What gives this alert weight is precisely the intensity of the set of phenomena predicted by Metsul. It is not just a rain front or a punctual weather change. The cyclone is described as intense, with the potential for winds above 100 km/h and the ability to propel a cold air mass that changes the temperature pattern in two southern states.

Another point that draws attention is the system’s abrangence. The formation begins on the Patagonian coast, spreads to the Rio de la Plata Estuary, advances through Argentina and Uruguay, and from this movement, influences Brazil. This expands the phenomenon’s reach and helps explain why the alert emphasizes the sequence between formation, displacement, and the arrival of cold.

When the cold begins and which areas should feel it most

According to Metsul, the cold air begins to advance through Rio Grande do Sul starting Sunday, April 27. It is at this moment that several cities in the state may record minimum temperatures between 5°C and 10°C, as a first more concrete sign of the cold air mass associated with the cyclone.

Santa Catarina also appears in the alert as an area expected to experience the same temperature drop. On the coast of both states, winds gain prominence throughout the week, with the possibility of reaching 90 km/h, which maintains the scenario of attention even after the onset of the cold air incursion.

What Metsul’s alert signals for the coming days

The scenario described by Metsul points to a significant change in weather conditions in the South of the country in the coming days. The intense extratropical cyclone begins to form this Saturday, advances until Monday, and paves the way for a sequence of rain, wind, and cold over part of Brazil.

With winds above 100 km/h in the system, gusts of up to 90 km/h on the coast of Rio Grande do Sul and Santa Catarina, and minimums between 5°C and 10°C in cities of Rio Grande do Sul, the alert places the cyclone at the center of attention at the end of April for bringing together immediate impact, regional scope, and an abrupt change in weather patterns.

Do you believe that this advance of the cyclone and cold air mass could bring one of the strongest temperature shifts this late April in Southern Brazil?

Metsul warns of an intense extratropical cyclone in the South Atlantic with rain, winds above 100 km/h, and the advance of a cold air mass over Southern Brazil, dropping temperatures to as low as 5°C in Rio Grande do Sul and Santa Catarina.

Metsul warns that the cyclone begins to form this Saturday in the South Atlantic and is expected to bring rain, winds above 100 km/h, and a cold air mass to Rio Grande do Sul in the coming days.

How the cyclone will form and advance in the coming days

The numbers that explain the scale of the alert

What changes in practice for Southern Brazil

Why this cyclone draws so much attention

When the cold begins and which areas should feel it most

What Metsul’s alert signals for the coming days

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Metsul warns of an intense extratropical cyclone in the South Atlantic with rain, winds above 100 km/h, and the advance of a cold air mass over Southern Brazil, dropping temperatures to as low as 5°C in Rio Grande do Sul and Santa Catarina.

Metsul warns that the cyclone begins to form this Saturday in the South Atlantic and is expected to bring rain, winds above 100 km/h, and a cold air mass to Rio Grande do Sul in the coming days.

How the cyclone will form and advance in the coming days

The numbers that explain the scale of the alert

What changes in practice for Southern Brazil

Why this cyclone draws so much attention

When the cold begins and which areas should feel it most

What Metsul’s alert signals for the coming days

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

Norway is drilling 27 kilometers of rock 392 meters below the bottom of a fjord to build the world’s largest and deepest underwater road tunnel — when completed, a 21-hour journey will be reduced to 10.

An astronaut spent 340 days in space while his twin brother stayed on Earth, and NASA found a “rejuvenating” effect, genes, microbiome, cognition, and immune system that revealed the biological cost of living outside the planet.

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