Frontal System Triggers Widespread Storm Warnings Across Brazil

Overview

• Inmet and regional weather centers issued layered alerts on Friday for many states in the South, Southeast and Centre-West, warning of heavy rain of roughly 30–100 mm per day and wind gusts reported locally between about 60 and 100 km/h.
• The South is already seeing impacts: Rio Grande do Sul reported damage across 136 municipalities with more than 70,000 people affected, about 6,300 displaced and thousands of homes damaged after storms earlier in the week.
• Forecasts and state services say the synoptic pattern will strengthen late Saturday into Sunday, concentrating the most widespread and intense storms during the election weekend when heavy rain, hail and strong winds are most likely.
• Authorities warn saturated soils and low-lying urban areas will raise the risk of flooding, landslides, fallen trees and power outages, and civil-defense agencies are advising people to avoid sheltering under trees and to follow local emergency guidance.
• Meteorologists link the episode to an unusually warm El Niño in the Pacific, with some specialists reporting Niño 3.4 sea-surface anomalies near +3°C, which raises the baseline for above-average spring and summer rainfall and more frequent severe convective events in southern Brazil.