Hail hits cities in the interior of RS Cities in Rio Grande do Sul recorded hail falls this Tuesday morning (21). Images show ice stones the size of a person's palm. In another photo, residents place a chicken egg next to the hail to compare the size. The storms hit the municipalities of Vale do Sol and Rio Pardo, in the Vales Region. ?? Hail happens during intense storms. It is a phenomenon that tends to be quick, but has destructive potential and can cause damage to roofs and crops, for example. In just a few minutes, falling ice can cause damage. ? Access the g1 RS channel on WhatsApp According to Climatempo Meteorologia, hail forms within clouds of great vertical extent, called cumulonimbus. Inside the cloud, air currents carry water droplets to extremely cold regions of the atmosphere, where freezing occurs. The particles rise and fall several times, accumulating successive layers of ice. When they become heavy and the air currents can no longer support them, the stones fall to the ground. The size of the ice chunks and the intensity of the "hailstorm" are variable. "Although hail reaches the ground in varying sizes, inside the clouds the ice stones can be huge. During the fall, part of the ice melts, reducing the mass, but there are still records of hail reaching the ground with a size similar to tennis balls, increasing the potential for damage", says Climatempo. Hailstorms are more frequent during spring and summer, as the combination of intense heat and high humidity favors the formation of cumulonimbus clouds. Despite this, the phenomenon occurs throughout the year, as was the case with the storms of the last few days in RS. Hail hits cities in the interior of RS Civil Defense of Rio Pardo Weather forecast The forecast indicates that Tuesday will be marked by intense rain and the risk of storms in a large part of the state of Rio Grande do Sul. Since the weekend, 49 cities have suffered damage from the storms and 19 people are homeless. According to Climatempo, the areas most subject to storms are the Northwest, North, Planalto and Serra regions, as well as locations north of the Porto Alegre Metropolitan Region. At these points, storms can be accompanied by electrical discharges and gusts of wind that can reach 80 km/h. The highest volumes of rain are expected between municipalities close to the border with Argentina and the Erechim region. In isolated places, accumulations can reach 100 millimeters, a scenario that increases the risk of flooding and flash floods. On Wednesday (22), the cold front advances towards Santa Catarina, Paraná and Mato Grosso do Sul. Even with the system moving away, the atmosphere will continue to be favorable to the occurrence of rain showers in different regions of RS. The most significant rainfall should occur between the Northwest, the North and the Mountains, where the rain can be heavy at times and generate new high accumulations. In Campanha and the South Zone, rain tends to be more irregular and localized. The forecast indicates a more significant change on Thursday (23). With the entry of a high pressure area associated with a mass of polar air, the weather becomes firm again in a large part of Rio Grande do Sul. Hail hits cities in the interior of RS Cristiano Trindade and Civil Defense of Rio Pardo VIDEOS: Everything about RS