The natural disasters that have happened in Brazil are, most of them, from atmospheric origin. The precipitation, in excess or shortage, is the atmospheric element that has contributed the most to the occurrences of these disasters in the South region of Brazil. This article describes an event of a heavy rainfall that took place in the state of Rio Grande do Sul, in the border of Agudo and Restinga Seca (two towns at this same state), after the sudden increase of the water level, in that a stretch of one hundred meters of the bridge over the Jacuí river, in RS-287, fell in the morning of January 5 th , 2010. The event was analyzed and characterized with the use of pluvial data supplied by the automatic station from the National Institute of weather forecasting (INMET), situated in the towns of Rio Pardo, Cruz Alta, Santa Maria, and Passo Fundo, as well as the fluvial levels of the Dona Francisca station obtained from the National Agency of Waters (ANA), besides the radar images to the analyzes of the special distribution of the rains, that come from the National Institute of Space research (INPE). To finish the data collect to the characterization of this event, through the model of time numeric prediction, the model BRAMS, developed to simulate atmospheric circulations of meso-scale phenomenon, it was possible to obtain diagnostic information related to the event of intense rain, making use of the data to re-analyze.Pages: 2135-214
