This weekend should be hot and rainy in much of Brazil. This Saturday (14), the passage of an atmospheric trough should favor storms in the South. In the interior of the Northeast, the concentration of humidity increases the risk of heavy rain.
🌧️ UNDERSTAND: Troughs are elongated areas of low atmospheric pressure that favor the formation of heavy clouds. They can cause heavy rain, thunderstorms and gusts of wind.
In the Southeast, the sun should appear for much of the day, especially in São Paulo, but isolated showers are expected during the afternoon. In Minas Gerais and Espírito Santo, rain should be more frequent.
On Sunday (15), instability is expected to gain strength and reach larger areas of the South, Southeast and Center-West. Heavy rain, lightning and gusts of wind are forecast.
According to the National Institute of Meteorology (Inmet), the instabilities are associated with the action of the atmospheric trough.
The system is expected to advance between the north of Argentina and Paraguay this Saturday, contributing to intensifying the rain mainly in Santa Catarina, Paraná, Mato Grosso do Sul and areas of Rio Grande do Sul.
At the same time, a humidity corridor that extends across the interior of the country should favor strong showers in areas of Bahia, Maranhão and Piauí, as well as parts of the North and Central-West.
The forecast is that temperatures will remain high, without the arrival of a new mass of intense cold air. Heat and humidity should contribute to the formation of thunderstorms, especially during the afternoon.
In the South, Saturday should start with periods of sunshine, but instability should increase throughout the day, especially from the west of the region.
Heavy rain and thunderstorms are forecast in Rio Grande do Sul, Santa Catarina and areas of Paraná. In the state of Rio Grande do Sul, there is also the possibility of hail, mainly in Campanha, in the west, in the center, in the north, in the northwest and in the Serra.
Despite the rain, the heat remains. In Porto Alegre (RS), the maximum can reach 31°C. In the interior of Rio Grande do Sul and Paraná, thermometers can also exceed 30°C.
In the Southeast, the forecast is for longer periods of firm weather in São Paulo. The sun should appear for much of Saturday, but the heat and humidity could cause isolated showers in the afternoon, including in the capital and the Metropolitan Region.
In Minas Gerais and Espírito Santo, the rain should mainly hit the north and east of Minas Gerais and areas of Espírito Santo territory, with the possibility of thunderstorms.
In Rio de Janeiro, the heat is also expected to prevail, with the possibility of isolated showers. Maximum temperatures can reach 30°C in the capital of Rio de Janeiro and in Belo Horizonte (MG).
In the Central-West, the combination of heat and humidity should favor heavy rain in Mato Grosso, Mato Grosso do Sul, Goiás and the Federal District.
There is a risk of storms mainly in the east of Mato Grosso, in Goiás and in areas of the north, northeast and south of Mato Grosso do Sul.
Temperatures are expected to remain high. Cuiabá (MT) may register a maximum of 36°C, while Campo Grande (MS) should reach 35°C.
In the Northeast, the main highlight of Saturday should be the rain in the interior of the region, especially in the west and south of Bahia, in the center and south of Maranhão and in the west and south of Piauí.
According to Inmet, there is a possibility of heavy showers accompanied by thunderstorms in these areas, which include important agricultural regions of the country.
The concentration of humidity should also favor storms with high volumes in areas of the interior of Bahia and the south of Maranhão and Piauí.
In other parts of the Northeast, the weather should become firmer, especially in coastal areas.
In Ceará, Rio Grande do Norte and Paraíba, the forecast indicates sun and few clouds for much of the day. In Pernambuco, Alagoas and Sergipe, there should also be periods of sunshine and there is no forecast of significant rain in most of these areas.
The heat remains intense. Teresina (PI) may register a maximum of 38°C, while Fortaleza (CE), Recife (PE), Maceió (AL) and São Luís (MA) should reach 32°C.
In the North, the rain should mainly hit Amazonas, Rondônia, Tocantins and the south of Pará, where there is a possibility of storms.
In Amapá, the approach of the Intertropical Convergence Zone (ZCIT) should favor the return of showers in the north of the state, especially in the Oiapoque region, after a period of drier weather.
In Boa Vista (RR) and Belém (PA), Saturday should be sunny and hot, with maximum temperatures reaching 36°C.
