Outono em Porto Alegre

Brazil is one of the countries with the highest incidence of tornadoes outside the regions traditionally known for such phenomena. According to a survey by the State University of Ponta Grossa (UEPG), between 1975 and 2018, a total of 581 tornadoes were recorded in the country, 411 of which occurred in the Southern Region, accounting for approximately 70% of all cases. In 2018, the PREVOTS platform was established to document severe weather events across Brazil. Upon completing five years of operation, a report indicated that between June 2018 and June 2023, 321 damage incidents caused by tornadoes were recorded, including waterspouts. Most tornadoes in Brazil are associated with high-precipitation supercells, resulting in rain-wrapped tornadoes that are difficult to see. The annual average number of tornadoes in Brazil remains uncertain due to the country's less robust meteorological infrastructure compared to nations like the United States or Canada, and because of the low population density in the most tornado-prone areas. These factors contribute to underreporting, with many tornadoes being identified only months or even years after they occur. Recent estimates suggest a plausible average of 50 to 60 tornadoes per year, although this figure lacks official confirmation due to the aforementioned limitations.