Cold Wave Sweeps Brazil as Alerts Expand for Heavy Rain, Wind and Frost

Overview

• Inmet warnings that were renewed Saturday cover parts of the Northeast and Centre‑South with 20–30 mm per hour or up to 50 mm per day and gusts of 40–60 km/h under yellow alerts, and up to 100 km/h under orange alerts.
• In the South, Santa Catarina logged freezing rain in highland towns Saturday as forecasts call for subzero dawns and a chance of frozen precipitation in the Serra Gaúcha.
• Mato Grosso do Sul reported sharp temperature drops Saturday, with Ponta Porã near 9°C and a near‑0°C wind chill, prompting Campo Grande to open an overnight shelter program for people on the streets.
• In the Southeast, São Paulo expects a wet, cooler Sunday with highs near 19°C, while Petrópolis issued a wind alert for gusts up to 70 km/h through late Sunday.
• Along the Northeast coast, a low‑level trough and moist onshore flow plus the Intertropical Convergence Zone are driving frequent rain, with Ceará and Paraíba under statewide alerts and Sergipe warning about flooding, landslides and power outages.