Rain and a drop in temperatures are expected across São Paulo and the southern states of Brazil over the weekend [1, 2].
The shift in weather patterns could disrupt travel and outdoor activities in some of the country's most populous regions. A new low-pressure area combined with cold fronts and wind circulation is driving the current rain and temperature drop [1].
According to the Instituto Nacional de Meteorologia (Inmet), the minimum temperature in São Paulo this Saturday is expected to be 11°C [2]. The maximum temperature for the city on Saturday is forecast to be between 16°C and 17°C [2].
Other forecasts provide a broader range for the capital. Jovem Pan News said thermometers in the São Paulo capital should vary between 15°C and 21°C [1].
Rain patterns remain a point of contradiction among meteorological reports. Jovem Pan News said rain will intensify starting Friday, May 15, 2024, particularly in southern Mato Grosso do Sul, western and northern Paraná, and western and southern São Paulo [1]. However, reports from MSN (g1) said rain would decrease and sun would begin to appear in some parts of São Paulo, including the capital, starting Friday, May 13, 2024 [3].
Regional impacts are expected to be most significant in the Sul region and neighboring states. The combination of the cold front and the low-pressure system creates a volatile weather environment, one that typically leads to sudden temperature shifts across the Brazilian highlands.
“A new low-pressure area combined with cold fronts and wind circulation is driving the rain and temperature drop.”
The variance in forecasts regarding rain intensity and temperature ranges suggests a highly unstable atmospheric transition. While the general trend is a cooling period, the contradictory reports on whether the sun will emerge or rain will intensify indicate that local microclimates in São Paulo may experience erratic shifts over the weekend.
