A new cold front will reach southern Brazil on Friday, which is likely to increase the risk of heavy storms, particularly affecting the states of Rio Grande do Sul and Santa Catarina over the upcoming weekend. This weather event comes as the region transitions away from the more organized influence of the South Atlantic Convergence Zone (ZCAS), allowing moisture that was previously directed toward the Central-West and Southeast regions to shift further south. Consequently, the frequency of summer thunderstorms in southern Brazil is expected to rise.

In addition to the impending storms in the south, the cold front will also contribute to sustained instability in the Southeast and Central-West regions, where rain has already been common in recent days. As temperatures remain high and humidity increases, the potential for severe weather phenomena continues to grow. The interaction between cold air masses and warm, moist air typically leads to the development of clouds and precipitation, providing conditions for thunderstorms.

Experts warn that the arrival of the cold front not only implies adverse weather conditions but also raises concerns for agriculture and local infrastructures in the affected areas, particularly given the already stressed meteorological scenario due to recent rain patterns. Communities in southern Brazil should prepare for impactful weather changes that could lead to flooding or other severe weather-related consequences.