Overview

• Brazil’s national weather service (Inmet) issued storm warnings valid until 23:00 Saturday for Paraná and all of Santa Catarina, citing possible hail, wind gusts up to 100 km/h, and heavy rain of up to 60 mm per hour or 100 mm in a day.
• A low‑pressure trough on Saturday and a reinforcing cold front on Sunday are forecast to drive widespread rain in the South, with totals above 60 mm in much of Rio Grande do Sul, eastern Santa Catarina, and the extreme south of Paraná.
• Central‑south Paraná may see around 50 mm, while northern Paraná is expected to receive about 10 mm with lower humidity, reflecting a sharp gradient between storm‑prone areas and hotter, drier zones.
• Simepar forecasts maximum temperatures up to 40°C across northern Paraná this weekend, with isolated storms favored in the state’s center‑south, southeast, and the Curitiba metro area.
• From Monday morning, clouds and rain are expected to develop first in the northwest, west, southwest, and center‑south of Paraná, with instability advancing through the day and a higher chance of storms in the southern half; elsewhere, large parts of the North and Center‑West remain very hot and dry with humidity below 30% and highs often above 36°C, locally exceeding 40°C in southwest Pará.