Impending Cold Front in Brazil: A Detailed Weather Forecast

Impending Cold Front in Brazil: A Detailed Weather Forecast

Extratropical Cyclone Triggers Weather Shift

The National Institute of Meteorology (Inmet) has predicted a significant change in weather conditions in certain parts of the South and Southeast regions of Brazil. This weather shift is expected to bring about storms, hail, and gusts of wind, particularly affecting the areas of Rio Grande do Sul and Santa Catarina, due to the formation of an extratropical cyclone.

Temperature Plunge and Rainfall Expected

Temperatures are projected to drop substantially from Wednesday to Thursday. In Rio de Janeiro, the temperature is foreseen to fall from 37oC to 22oC, and in São Paulo, from 35oC to 20oC. Along with this, heavy rains are likely in the eastern part of São Paulo until the end of Wednesday.

Weather Variation Across the Country

While a significant part of the country will experience the cold front, some areas will remain unaffected. The last week of September is expected to bring dry weather to the regions of central and northern Minas Gerais and western São Paulo. Conversely, in southern Minas Gerais and between Espírito Santo and Rio de Janeiro, rainfall accumulation may surpass 50 millimeters.

Midwest and North Region Weather Forecast

In the Midwest, a persistent warm, dry air mass at the week’s beginning will keep the weather stable, with chances of isolated rain and low relative humidity levels, below 30%. Meanwhile, the North region will witness rainfall volumes greater than 50 millimeters in the northwest of Amazonas and the extreme west of Acre due to heat and high humidity. However, most parts of Pará, Amapá, and Tocantins are expected to experience dry weather with no rain, while other areas may have low volumes, less than 30 mm.

Forecast for Early October

Inmet’s forecast for the period from next Tuesday to October 10 is for chances of rain in all Brazilian regions. In the North, rainfall accumulation might exceed 30 mm in the northwest Amazonas and Acre. In the Northeast, Midwest, and Southeast regions, rain accumulation may range from 20 to 50 millimeters. In the South, higher accumulations are forecasted, more than 90 mm, especially in Rio Grande do Sul, western Santa Catarina, and southern Paraná.