Everything started Monday morning when a gust front raced trough the state of Rio Grande do Sul, causing minor damages. There were reports of hail, high winds and drenching downpours.
Later in the day the front reached the state of Parana, near the border with Argentina and Paraguay. Clovis Padoan Filho took those fascinating pictures from his home in the city of Pato Branco.
In Maringa (city where I live) the sky is covered now. The temperature is 32.4°C (93.5°F).