Low-Pressure Trough Drives Severe Storms Across Southern Brazil as Alerts Reach São Paulo and Rio
Forecasters expect up to 100 mm of rain in 24 hours with damaging gusts continuing through the weekend.
Overview
- An elongated low-pressure system that formed over Paraguay and northern Argentina is crossing Paraná and channeling deep moisture that is fueling rapid thunderstorms.
- Cities in western Paraná logged exceptional rainfall in hours, including Palotina with 140.6 mm (about 82% of its monthly normal) and Assis Chateaubriand with 138.8 mm.
- Stations in Paraná recorded strong gusts, led by Candói at 80.6 km/h, with several other sites topping 50 km/h.
- Inmet issued alerts that include São Paulo and Rio de Janeiro for intense rain up to 100 mm/day, very strong winds up to 100 km/h, and the potential for hail and flooding.
- Risk bulletins from Defesa Civil and Simepar flag the frontier with Paraguay and borders with São Paulo and Mato Grosso do Sul for the highest storm risk, with forecasts pointing to locally 150–200 mm in Paraná through Sunday and a new front early next week.