On December 6, 2024, the National Institute of Meteorology (Inmet) of Brazil issued two severe weather alerts for the northern half of Rio Grande do Sul. The alerts indicate the potential for intense storms and heavy rainfall throughout the region.
Rainfall is expected to commence early on Saturday, with significant precipitation concentrated from the early morning until early afternoon. The areas of Palmeira das Missões and Iraí are forecasted to receive the highest volumes, with expected rainfall of 97 mm and 87 mm respectively, accounting for 51% and 47% of the historical average for December.
Temperatures are projected to drop, with lows of 12°C in Chuí and 13°C in Canguçu. The region's capital, Porto Alegre, is anticipated to experience temperatures ranging from 19°C to 24°C.
On Sunday, December 8, conditions will remain overcast with light rain in the northern and northwestern regions. The influence of a cold front is expected to bring additional precipitation, particularly near the border with Santa Catarina.
Frederico Westphalen is expected to receive 66 mm of rain on Sunday, which represents 35% of the historical average for this period. In Porto Alegre, intermittent showers may occur, but without significant accumulation.
Overall, the weekend forecast for various regions includes instability, with fluctuating temperatures and conditions ranging from clear skies to heavy rain.