Brazil will face storms, frost, and low humidity this weekend, according to Inmet alert

A bomb cyclone continues to influence the weather in Southern Brazil during this Friday (7) and Saturday (8). Inmet issued an alert predicting storms, potential hail, and wind gusts in various locations in the region.

After the passage of this meteorological system, the climate scenario will undergo rapid changes. The cold will intensify in Rio Grande do Sul, increasing the risk of frost and causing a drop in temperatures. Additionally, much of the country's interior will continue to face concerns about low air humidity.

The forecast provided by Inmet indicates that the extratropical cyclone, which is rapidly intensifying, still affects the South of the country and also generates instability in southern Mato Grosso do Sul and parts of São Paulo.

Main points of the forecast

The period of greatest climatic attention remains focused on Paraná and Santa Catarina. In these states, intense rainfall, thunderstorms, strong winds, and the possibility of hail are expected throughout Friday.

On the other hand, Rio Grande do Sul will begin to register a progressive improvement in atmospheric conditions. Precipitation will decrease in intensity, paving the way for the arrival of a strong cold air mass.

While Paraná and Santa Catarina persist with instability, Rio Grande do Sul will have a weekend characterized by cold.

On Saturday (8), stable weather will contribute to a sharp reduction in temperatures, particularly in the south-central region of the state, where thermometers may approach 0°C. In these areas, conditions are also favorable for the formation of frost.

In Porto Alegre, the minimum predicted temperature is 5°C, and the maximum should not exceed 15°C.

In regions outside the area impacted by the cyclone, the climate picture shows little variation. A large portion of the Center-West, Southeast, and Matopiba region maintains low relative humidity levels, keeping the alerts issued by Inmet.

Rain will remain concentrated mainly over western Amazonia and segments of the Northeast coast. In other inland areas, the weather tends to be stable.

olhardigital.com.brAugust 6, 13:32

After cyclone, temperature drops in the South Region; Porto Alegre may record 8°C

An intensifying extratropical cyclone over the South Atlantic has placed the Southern Region on alert between Thursday (6) and Friday (7). This phenomenon increases the risk of strong winds, storms, and hail.

The effects of this cyclone are also expected in southern Mato Grosso do Sul and São Paulo, where the National Institute of Meteorology (Inmet) forecasts isolated rains and thunderstorms. The most severe scenario is in the south-central part of Rio Grande do Sul, which is under a red alert for great danger of storms. In all three states of the Southern Region, the forecast points to intense rain, thunder, wind gusts, and the possibility of hail.

On Friday (7), although the cyclone begins to move away, it will still maintain areas of instability over Paraná and western Santa Catarina. Subsequently, a cold air mass will advance, causing a sharp drop in temperatures.

Main predicted impacts

Among the most significant anticipated impacts are the progression of unstable areas to southern Mato Grosso do Sul and São Paulo, maintaining conditions favorable for isolated rain and storms during the two forecast days. In São Paulo, precipitation is expected to increase in intensity, potentially reaching southern Minas Gerais and Rio de Janeiro. This area will also remain under alerts related to strong winds and low humidity in specific locations.

In the Central-West, Mato Grosso do Sul is the main focus of windstorm and storm alerts, while other regions of the state will have stable weather. While the cyclone concentrates its effects in the South-Central region, rains will remain restricted to Western Amazonia and parts of the coastal strip of the Northeast.

In the interior of the country, the predominant weather is dry, characterized by low relative humidity levels in parts of the Central-West, Southeast, and Matopiba. In the Northeast, warnings of strong winds persist in certain coastal areas and low humidity in several states.

After the passage of the cyclone, a cold air mass will begin to advance over the Southern Region. Because of this, Porto Alegre may record 8°C on Friday night, while Palmas and Teresina have the potential to reach up to 36°C. Inmet continues to monitor the cyclone due to potential impacts on Southern Brazil.

olhardigital.com.brJuly 25, 11:15

Weather forecast points to climate change with heavy rains and hail over the weekend in several regions of Brazil

The weather will undergo transformations in various Brazilian locations this weekend. Inmet anticipates the occurrence of storms, thunderstorms, and potential hail between Saturday, the 25th, and Monday, the 27th, primarily affecting the South, Southeast, and Midwest regions.

Distribution of rain systems

While some areas will face intense precipitation, other parts of the national territory will show a predominance of dry weather and a decrease in atmospheric humidity, especially in the interior of the states.

Alerts for Saturday (25th)

On Saturday, the locations with the highest probability of storms include eastern Mato Grosso do Sul, northern Paraná, São Paulo, southern Minas Gerais, extreme south of Goiás, as well as points in Rio de Janeiro and Espírito Santo. According to the National Institute of Meteorology (Inmet), these conditions are caused by the presence of a surface trough over the interior of the South Region and a low-pressure zone near the Southeast coast.

The main warnings issued for the coming days include storms with hail risk in the South, Southeast, and Midwest regions; a reduction in rainfall in the Northeast region; the return of instabilities to Rio Grande do Sul and Santa Catarina; and an increase in low humidity in inland areas of Brazil.

Sunday's Dynamics (26th)

For Sunday, a new low-pressure system, positioned between northern Argentina and Paraguay, is expected to contribute to the resurgence of rains in the South. Simultaneously, the South Atlantic Subtropical High will intensify its influence over parts of the Southeast and Northeast, helping to maintain more stable weather in these areas.

Regional Differences in North and Northeast

In the North Region, rains remain concentrated in the states of Amazonas, Roraima, and northwestern Pará. The heat and high humidity typical of the Amazon can also generate isolated showers in other locations.

Rondônia, southeastern Pará, and Tocantins should monitor the low relative air humidity during the afternoon. Among the capitals, Rio Branco and Porto Velho may record minimum temperatures of 21°C, while Palmas is projected to reach 36°C.

In the Northeast, the forecast points to a decrease in rainfall. Although the coastal strip covering Alagoas, Pernambuco, Paraíba, and Rio Grande do Norte may still register precipitation, the interior should maintain firm weather.

Rapid Changes in South and Southeast

In the Southeast, São Paulo, south-central Minas Gerais, west of Rio de Janeiro, and southwest of Espírito Santo are among the areas with the possibility of storms on Saturday. However, in the following days, the trend is toward the progression of dry weather.

In the South Region, rains will regain strength starting Sunday, mainly impacting Rio Grande do Sul and the southern areas of Santa Catarina. In Paraná, rainfall events should be more sporadic.

Expected temperatures vary significantly, ranging from 11°C in Curitiba (PR) to 36°C in Cuiabá (MT). Inmet emphasizes that the forecast may change as the meteorological systems advance.