Deepening Extratropical Cyclone Prompts Multi‑State Severe Weather Alerts in Brazil

Overview

• INMET has active orange and yellow warnings across wide areas with rain thresholds of 30–60 mm per hour or 50–100 mm per day and wind potential of 60–100 km/h, citing risks of outages, flooding and falling trees.
• Santa Catarina begins to feel effects this Monday, with Defesa Civil projecting temporals, flooding risk and coastal waves near 3 meters, plus interior gusts that could reach 80–90 km/h.
• Rio Grande do Sul enters a period of heightened instability from Monday into midweek with potential hail and strong gusts across most regions, according to Climatempo and MetSul.
• A corridor of unstable weather extends beyond the South into parts of Paraná, São Paulo, Rio de Janeiro and Espírito Santo coasts, Minas Gerais, Goiás, Mato Grosso do Sul, Tocantins and Piauí with variable alert levels.
• Authorities urge the public to avoid flooded areas, secure loose objects and steer clear of trees during gusts, with emergency assistance available via 193 for firefighters and 199 for civil defense.