With the recent passage of a cold front and the weakening of high atmospheric pressure, moist air has spread across almost the entire country.
10 highest temperatures recorded in Brazil on 09/28/2023, only via measurement by the National Institute of Meteorology (preliminary)
Araçuaí/MG: 42.2°C
Itaobim/MG, Salinas/MG: 40.9°C
January/MG: 40.8°C
Mocambinho/MG: 40.5°C
Oeiras/PI, Janaúba/MG: 40.3°C
Good Jesus from Lapa/BA: 40.2°C
San Romão/MG: 40.1°
Ibotirama/BA, Piripiri/PI: 40.0°C
Weather conditions over Brazil
A cold front moves away from Brazil, towards southern Bahia and another cold front arrives on the southern coast of Rio Grande do Sul.
Dry air prevails in the Northeast, Amapá and the northern part of Pará, leaving few clouds in these areas of the country.
After the passage of a cold front in the South-East and with the weakening of high atmospheric pressure within Brazil, moist air spread over almost the entire country, facilitating the formation of rain clouds.
Photo: Brasilia (DF) by Aiane Resende
Weather forecast for Brazil from 09/29/2023 to Friday
Southern region
The circulation of winds at various levels of the atmosphere, the arrival of a new cold front that reaches the extreme south of Rio Grande do Sul and the entry of cold and humid winds that blow from the sea towards the continent stimulate the formation of numerous clouds over the Southern Region.
On the southern coast of Rio Grande do Sul the sun appears, but there is a chance light rain at any time. In the west, south, center and east of Rio Grande do Sul the sun appears all day, with periods with many clouds, but no rain is expected. In the center, north and west of Rio Grande do Sul it is sunny, but there is a risk of some rain since the afternoon.
Watch out for moderate to heavy rain in the center, south and east of Paraná, in the north of Santa Catarina and in the Itajaí Valley, which can occur at any time. In the west, center, south and east of Santa Catarina, in the west/southwest and north of Paraná the sun appears and rain showers are expected in the afternoon and evening.
South-eastern region
A recent passage of a cold front it spread areas of instability in the south-eastern region and lowered temperatures. But yesterday (Thursday) the temperature still reached values around 40°C in the north and north-west of Minas Gerais.
Rain is expected across all south-eastern states on Friday.
In Zona da Mata and inland from Rio de Janeiro the day is cloudy, with possibility of drizzle and mild temperatures. In Greater São Paulo and in the east of São Paulo dawn with cloudy skies, but in the morning the sun appears and it may rain a little in the afternoon, in isolation. In the central-east and central-west of São Paulo the sun appears all day, but it can rain quicklyand, in small areas.
On the coast of São Paulo and Espírito Santo the sun appears among many clouds, but it rains quickly at any time. The coast of Rio de Janeiro might have light rain at dawn and in the morning, then there are periods with sun among many clouds.
In almost the entire state of Minas Gerais (except Zona da Mata), in the interior of Espírito Santo and in the north/northwest of the state of São Paulo, periods of sunshine and rain showers with lightningbut especially in the afternoon and at night.
Attention to hangover between Santos, on the coast of São Paulo, and Arraial do Cabo, in Rio de Janeiro.
Pay attention to the risk of isolated hail in the central-south of Minas Gerais
Midwest Region
Moist air spread over the Midwest and with the warm air already over the region, heavy clouds formed again.
OR the sun predominates and it doesn’t rain only in the far west of Mato Grosso do Sul, on the border with Bolivia.
The south of Mato Grosso do Sul is sunny for most of the day, but temporary rain showers.
For the Federal District, throughout the state of Goiás and in Mato Grosso, in the other areas of Mato Grosso do Sul, periods with sun and rain showers with lightning mainly in the afternoon and night. Some strokes may be moderate to strong in intensity, but short in duration and in small areas.
North-East Region
The presence of dry air in almost all of the Northeast makes the formation and growth of large clouds difficult. Almost all of the Northeast has another day with it plenty of sunshine and no rain conditions.
In the extreme south of Maranhão and Piauí and in the west and on the southern coast of Bahia, the sun appears for most of the day and there may be some Rain showers with lightning in the afternoon and evening, moderate to heavy.
There is a prediction of temporary rain showers on the coast from Salvador to Natal.
Northern Region
Heavy clouds develop over almost the entire northern region due to the presence of moist and warm air.
In Amapá, on the coast, in the north and north-east of Pará and in the extreme north of Tocantins, the sun seems strong and it doesn’t rain.
In Acre, in the extreme south of the Amazon and in Rondônia, the rain showers They occur at any time and can be strong, interspersed with sunny periods.
In the other areas of the Amazon, Pará, Rondônia, Tocantins and Roraima, the sun appears strong for several hours and forecasts rain showers with lightning, mainly in the afternoon and at night. Most of these hits are short-lived and affect limited areas, but some can be strong.
Attention due to the risk of isolated hail in the south of the Amazon, Acre and Rondônia
Weather alert for 09/29/2023 – Friday
Watch out for moderate to heavy rain in capital cities Curitiba, Belo Horizonte, Goiânia, Brasilia, Cuiabá, Porto Velho and Rio Branco.
Warning for thunderstormswith risk of wind gusts up to 70 km/h in Acre, in the south of the Amazon, in Rondônia (except the north of the state), in the Serra da Canastra region (MG), in the northern part of southern Minas and in Upper Paranaíba (MG)
Be careful of the risk of isolated hail in the south of the Amazon, in Acre, Rondônia and in south-central Minas Gerais
Watch out for moderate to heavy rain with lightning and wind gusts up to 60 km/h west/southwest, south, center and east of Paraná, northern plateau and Vale do Itajaí, in Santa Catarina, in the Triângulo Mineiro, Grande Belo Horizonte, west of Minas Gerais, in Mato Grosso , in Goiás, in the Federal District, south of Tocantins, south of Pará, west, center and south-east of Amazonas, west coast and south of Bahia.
Hangover alert between Santos (SP) and Arraial do Cabo (RJ), with waves of 2.5 to 3.0 meters.
Be careful with very dry airwith humidity rates between 21% and 30% in the São Francisco Valley, Bahia, the interior of Piauí and the hinterland of the Northeast.
Source: Terra

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