Southern Brazil braces for strong winds, while other regions face dry air and potential storms

Southern Brazil is expected to experience strong winds reaching up to 70 km/h on Friday, October 31st, particularly along the coasts of Rio Grande do Sul and southern Santa Catarina. These gusts, driven by a pressure difference between approaching low-pressure systems from Argentina and Paraguay and a high-pressure area over the ocean, may also affect western Rio Grande do Sul, western Paraná, and southern Mato Grosso do Sul. The sea is predicted to become more agitated along the southern coast. Despite the wind, most of the southern states will see clear skies, with potential fog in the early morning. However, the dry conditions are affecting 14 states and the Federal District, with humidity levels potentially dropping to between 12% and 30% in some areas, especially during the afternoon. Meanwhile, the Northeast region will see rain concentrated along the coast, from Bahia to Rio Grande do Norte, with moderate to locally strong downpours possible. The North region will experience scattered showers, with moderate to heavy rain expected in Roraima, Amazonas, Amapá, and parts of Pará, particularly in the afternoon and evening. The weekend forecast indicates a return of storms to Rio Grande do Sul, with heavy rain, thunderstorms, and possible hail, especially near the Uruguayan border, with accumulations potentially nearing 100 millimeters in some locations. These storms are also expected to impact western and southern Santa Catarina, and southwestern Paraná. In contrast, the Southeast region will see a gradual cooling trend as a cold front moves offshore, reducing wind intensity and cloud formation, though morning fog is possible in coastal areas of São Paulo, Rio de Janeiro, and southern Espírito Santo. The forecast for Rio de Janeiro city suggests sunny skies and temperatures rising to around 30-31°C by Sunday, with only a slight chance of brief, light rain on the coast.