La Niña brings heavy rain and heat to parts of Brazil

summary
La Niña is expected to lead to a wetter summer in much of Brazil, especially in the Midwest, Southeast, North and Northeast, while the southern region, Mato Grosso do Sul and Sertão Nordestino will see drier periods and above-average temperatures.

The most anticipated time of the year for tourists who love the sun and beaches is approaching: summer. The hottest season officially begins on December 21, and many Brazilians are already wondering when the extreme heat will arrive. According to National Institute of Meteorology (Inmet)The answer is not so simple, mainly due to the impact of this phenomenon No Nina.

Inmet reported that next summer should be characterized by heavy rainfall and formation South Atlantic Convergence Zone (ZCAS)a wide band of clouds responsible for causing continuous rain for at least four consecutive days.

The areas expected to experience more storms are the central-western and southeastern regions and part of the northern and northeastern regions. The southern region tends to experience a dry period. The institute confirmed that the official summer forecast has not yet been issued, but is scheduled to be published in mid-December.

What areas will have above average temperatures?

While some areas will experience rainy days, others are expected to record above-average temperatures, with several sunny days even in the middle of the rainy season, a typical scenario for the so-called summer season.

Although it is still too early to confirm whether these dry spells will occur, Enmet points out that the areas most vulnerable to heat, in principle, are: the southern region, Mato Grosso do Sul and the northeastern hinterland.

In these areas, where rain tends to be less frequent at this time of year, the more open the sky leads to a significant rise in temperatures.

Between January and February, when summer is historically most common, there may be consecutive days of clear skies and intense heat, especially in areas with a tropical climate. This scenario increases the state of alert for respiratory diseases and fires.

The intensity of the heat depends on the development of the rainy season and the frequency of these dry periods throughout the summer.

La Niña will have a stronger impact in the summer

The La Niña phenomenon was confirmed this spring, and there was heavy rainfall during this period. It usually takes about three months to fully affect the climate in Brazil, and if it persists through the summer, it should enhance rainfall and increase the frequency of SACZ episodes in central and southeastern Brazil.

Therefore, the most likely scenario is a more rainy summer in these areas, and thus moderate heat during long periods of cloudiness.

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