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Rapid weather change marks the week on the São Paulo coast, with temporary relief in temperatures followed by a sharp rise in heat and high thermal sensation, reflecting an autumn with unusual characteristics in the coastal region of São Paulo.
The advance of a cold front brings a momentary respite to the coast of São Paulo at the beginning of the week, but the scenario changes quickly and the heat returns with intensity starting Thursday, May 7, according to meteorological forecasts.
Afternoons with highs near 25 °C, the trend indicates a significant rise, bringing temperatures back to the 30 °C range, while the thermal sensation can reach up to 33 °C in more humid areas.
This behavior follows a weekend of instability, marked by wind gusts, increased cloudiness, and recorded rainfall in different cities along the São Paulo coastline.
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Roll cloud forms impressive scene on the coast of SP and scares tourists as it advances for kilometers in the sky during an intense cold front, a rare tubular cloud phenomenon associated with the collision of air masses.
According to the National Institute of Meteorology, the influence of the frontal system still persists at the beginning of the week, although the loss of strength occurs gradually as the phenomenon moves towards the ocean.
Cold front loses strength on the São Paulo coast
Right on Monday, May 4, the day begins with many clouds and the possibility of isolated rain in parts of the coast, maintaining a more overcast weather pattern compared to previous days.
In Santos, temperatures range between 17 °C and 25 °C, creating a more comfortable feeling after the recent period of heat and stuffiness recorded in the region.
Even with intervals of overcast sky throughout the day, the trend indicates a progressive decrease in instability, accompanying the weakening of the cold front over São Paulo territory.
Meanwhile, the system loses intensity mainly over the ocean, allowing warmer air to gradually re-establish itself over the state in the following days.
According to Inmet’s weekly bulletin, the rain forecast for the coast and southern São Paulo shows low accumulations, a typical characteristic of fast-moving cold fronts during this period.
In specific areas of the coastal strip, isolated showers may still occur, influenced by local factors such as maritime circulation and terrain variations.
Temperatures rise throughout the week
With reduced cloudiness, Tuesday, May 5, and Wednesday, May 6, should see more sunshine throughout the day, favoring a gradual rise in temperatures.
At the same time, the probability of rain decreases considerably, making way for warmer afternoons compared to the beginning of the week, although mornings still maintain a slight feeling of coolness.
During the night and in the early hours of the day, minimums remain mild, but warming intensifies in the afternoon due to greater solar incidence and less influence from the cold air mass.
In urban areas near the waterfront, this temperature increase can be perceived with greater intensity, especially where maritime ventilation is less efficient.
Thursday, May 7, represents the most evident turning point in the climate pattern, consolidating the return of more intense heat to the São Paulo coast.
In Guarujá, for example, the forecast indicates predominant sunshine, few clouds, and rising maximums, reinforcing the warming trend across the entire coastal region.
Intense heat returns with high thermal sensation
With the combination of strong sun, high humidity, and less cloud cover, the thermal sensation tends to exceed the values recorded by thermometers throughout the day.
Thus, even with highs near 30 °C, the perception of heat can reach 33 °C, especially during periods of greater solar incidence and less wind circulation.
On Friday, May 8, the scenario remains similar, although there is a slight increase in clouds in some parts of the coast, without significant impact on temperatures.
Although cloudiness varies throughout the day, there is no indication of a significant drop in temperatures, maintaining persistent heat conditions during the afternoons.
This type of variation reinforces a common characteristic of transitional seasons, when frontal systems pass quickly and cannot sustain prolonged periods of cooling.
As a result, the contrast between cooler mornings and warm afternoons becomes more evident, especially in coastal regions.
Autumn with above-average temperatures in Brazil
Even with the passage of cold fronts, autumn has shown frequent episodes of above-average heat in several regions of the country, indicating a less typical climate pattern for the season.
On the coast of São Paulo, this fluctuation is clearly manifested throughout the week, with milder initial days followed by rapid and significant warming.
Given this scenario, monitoring meteorological updates becomes essential, as changes in the trajectory of frontal systems can modify predicted conditions in the short term.
Furthermore, factors such as wind and humidity continue to exert a direct influence on thermal sensation, altering the perception of heat even when temperatures do not vary significantly.
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