The objective of this work is to analyze the occurrence or not of tornadoes in the city of Guatambu, state of Santa Catarina (SC), southern Brazil, at the end of the night of 13, at dawn on September 14, 2021. Alerts by the official agencies of the region of the probable occurrence of tornadoes and strong storms in the area between the northeast of Argentina, Uruguay and Rio Grande do Sul. A tornado is the most violent windstorm on earth. The tornado is a rotating column of air that extends from a cloud to the ground. The analysis of satellite maps indicated the occurrence of storms, with probable formation of tornadoes in the municipality of Guatambu. Thus, confirming reports from residents, official bodies such as the Civil Defense of Santa Catarina, and the state's meteorological system. It is likely that the formation of a tornado in the municipality of Guatambu occurred between 01:20 UTC on and 02:10 UTC on Sep 14, 2021.