Wind rips roof off building during storm in RS A security camera shows the arrival of the storm in São Leopoldo, in the Metropolitan Region of Porto Alegre, at around 8:30 pm on Thursday (6). In the images, it is possible to see the moment when the building of a law firm is roofed by the force of the wind. In the capital, winds reached 120.4 km/h. Rio Grande do Sul recorded damage in several regions on Thursday (6). The weather forecast indicates that there is still a chance of storms this Friday (7) due to an extratropical cyclone, which has formed over the ocean. ? Access the g1 RS channel on WhatsApp Despite the rain forecast for this Friday, the weekend will be steady weather. The highlight of the next few days will be the return of the cold, with minimum temperatures close to 0°C. Severe weather caused a tornado in Pedro Osório, in the south of RS, this Thursday. It was the second tornado to hit Rio Grande do Sul within ten days. On July 28, the phenomenon reached the Northwest region, in the municipalities of Giruá, Sete de Setembro and Senador Salgado Filho. ? According to Climatempo, the tornado was generated by a supercell, a type of storm with a rotating updraft. "Supercells commonly cause large hail and intense gusts of wind, and on some occasions tornadoes", explains Civil Defense. In total, eight cities reported damage this Thursday. Wind rips roof off building during storm in RS Marcos Pacheco/RBS TV Forecast for the weekend Throughout this Friday, the cold front moves away and the weather gradually improves in most of the state, with a reduction in rain. The entry of a mass of cold air will cause temperatures to drop until the evening, when the minimum temperatures will be recorded. On the Coast, Metropolitan Region, Valleys and part of the Eastern Half, the cyclone in the ocean favors gusts between 70 and 90 km/h, with the possibility of occasional damage. On Saturday (8), the day will have mostly firm weather in most of Rio Grande do Sul, under the influence of the cold air mass that advances over the state. The dawn will be freezing, with the possibility of frost in regions of the Campaign, Western Border, Center, South and areas of higher altitude. Throughout the afternoon, according to Climatempo Meteorologia, warming favors the formation of new areas of instability between the North and Northeast of the state. In these regions, rain showers may occur accompanied by isolated thunderstorms, lightning and possible hail between the afternoon and evening. In other areas, the weather remains firm. On Sunday (9), the sun will appear between clouds in practically all of Rio Grande do Sul. Only the north of the state will still be able to record light and isolated rain. Dawn will be quite cold, with minimum temperatures close to 0°C in several areas and the formation of frost. Tornado destroys rancher's house in Pedro Osório, RS House destroyed by tornado A resident of Pedro Osório had his house completely destroyed by the tornado. Leonardo Hepp Ferreira, director of Agriculture at the city council and a livestock farmer, said he was outside the property at the time of the storm and only saw the extent of the damage when he returned to the site. According to Ferreira, he had gone to work in the afternoon. Once in the city, he noticed the beginning of the storm and began receiving messages informing him that a tornado had passed through the region where his residence is located, in the town of Vila Matarazzo. When the weather conditions improved, he went to the property. The scenario found was one of devastation. "War scenario, everything dismantled. There's nothing left", reports Ferreira. Tornado hits RS for the second week in a row Paulo Cesar Maciel Andrade/Images provided READ ALSO: Tornado destroys rancher's house in Pedro Osório: 'War scenario, there's nothing left' 'Very scary', says rural producer who filmed tornado Tornadoes: why RS is among the most favorable regions in the world for the phenomenon RS records a new tornado for the second week in a row Arte/g1 VIDEOS: Everything about RS