This phenomenon was confirmed by radar analysis, overflight, and ground inspection. The tornado that hit Rio Bonito had wind speeds of 300 km/h to 330 km/h. As a result, it reached category F3 on the Fujita scale, which measures the strength of tornadoes. The tornadoes in Turbo and Guarapuaba were classified as F2, and both had wind speeds of less than 300 km/h.