On Wednesday, April 16, 2025, the North Region of Brazil is set to experience widespread rainfall across all states, as the National Institute of Meteorology (INMET) has issued a yellow alert for potentially intense rainfall in specific areas. This alert covers all of Rondônia, southern and western Amazonas, all of Tocantins, and the extreme south of Pará, predicting heavy rainfall, gusty winds, and a small risk of flooding.
According to INMET, the forecast indicates that the strong rains could accumulate between 20 and 30 mm/h or up to 50 mm/day, with wind gusts ranging from 40 to 60 km/h. The alert, classified as "potential danger," is in effect until 10:00 AM on April 16, 2025, and encompasses a total of 1,557 municipalities across Brazil.
In the North Region, states like Acre, Roraima, Amapá, and most of Pará will experience isolated showers, mainly in the afternoon. However, the rain is not expected to be severe. Notably, Manaus, Boa Vista, Macapá, Belém, and Porto Velho are forecasted to be the rainiest capitals on this day.
While the weather will be humid and oppressive, temperatures in Boa Vista may soar to a record 38°C. Meanwhile, Manaus, Macapá, and Belém are expected to reach a maximum of 33°C.
The yellow alert comes as part of a broader warning issued by INMET for heavy rainfall affecting numerous municipalities throughout the country. The warning, which started on Tuesday, April 15, 2025, is a precaution against the potential risks associated with such weather conditions, including the possibility of power outages, fallen branches, and flooding, although the overall risk is considered low.
As the rain moves across Brazil, the low-pressure system off the Southeast coast is contributing to this climate instability. The forecast suggests that localized rains will primarily affect the central region of Brazil, with significant rainfall expected in states like Minas Gerais, Mato Grosso, and Mato Grosso do Sul.
In Minas Gerais, the rain is expected to be more scattered, with the highest volumes anticipated in the northwest part of the state. Meanwhile, in Mato Grosso do Sul, heavy rains are forecasted for the western region, including the capital, Campo Grande, early in the day.
As the day progresses, the precipitation will spread from the west of Amazonas, passing through Acre, Rondônia, Mato Grosso, and Mato Grosso do Sul, reaching as far as Goiás, São Paulo, Rio de Janeiro, Minas Gerais, and Espírito Santo. The areas most likely to experience intense rainfall include the eastern part of Mato Grosso do Sul, isolated points in western São Paulo, the Zona da Mata region of Minas Gerais, and large areas of Amazonas and Rondônia.
Motorists are advised to exercise caution during this weather event. INMET has warned against seeking shelter under trees due to the risk of falling branches and electrical discharges. Additionally, drivers should avoid parking vehicles near transmission towers and advertising signs to prevent accidents. Individuals are also urged not to use electronic devices plugged into outlets during the storm, especially in high wind conditions.
For those in affected areas, further information can be obtained from the Civil Defense by calling 199 or the Fire Department at 193. As the weather unfolds, residents are encouraged to stay informed and prepared for the potential impacts of the heavy rains.
With the weather patterns shifting and the potential for severe storms, it is essential for residents to remain vigilant and heed warnings from meteorological authorities. As always, safety should be the top priority during such unpredictable weather events.
