Extratropical Cyclone Triggers Multi-State Storm Alerts Across Brazil’s South

Overview

• Multiple INMET and Civil Defense alerts remain in force Sunday for the South and parts of the Southeast and Northeast, and authorities urge standard precautions including avoiding trees in gusts and calling 199 or 193 in emergencies.
• Paraná faces an INMET “danger” warning that allows for 30–60 mm of rain per hour, winds of 60–100 km/h, and hail, raising risks of power cuts, fallen trees, and flash flooding.
• Santa Catarina’s Civil Defense reports moderate risk of flooding and rapid runoff in the West, Mid‑West, plateaus, Vale do Itajaí, Grande Florianópolis, and the North as the nearby cyclone boosts isolated severe storms.
• Yellow storm alerts also cover parts of São Paulo and Rio, while Ceará and Paraíba post warnings for heavy rain of 20–30 mm/h and 40–60 km/h gusts, with Paraíba under an orange alert for high daily totals.
• Forecasters expect the center to move offshore Monday with coastal gusts and rough seas lingering into Tuesday, followed by a strong cold air mass Tuesday–Wednesday that sharply lowers temperatures with subzero lows possible in highlands.