High temperatures: how long will the heat wave last, according to experts
The Capital reached today around 3:45 p.m. second highest temperature in its history, 41.5 ° C. We did not have to go back decades, but days. In fact, last Tuesday, when 41.1°C had been recorded. That day, the city had exceeded 40.5°C on December 18, 1995. However, contrary to forecasts, in the midst of a heat wave that began last Monday, the Capital was not above its historical maximum (43 .3°C) recorded on January 29, 1957.
The extreme temperatures, yesterday, returned to punish the center of the country. In fact, the town with the highest maximum of the day was Punta Indio, in the province, with 43.1 ° C. Meanwhile, Mar del Plata reached its highest historical record minutes before 4:00 p.m., when the thermometer showed 41.9°C.
In addition to the Buenos Aires territory, seven provinces exceeded 40°C: Catamarca, Córdoba, Santa Fe, Santiago del Estero, Entre Ríos, La Rioja and Tucumán. In contrast, Tierra del Fuego and Santa Cruz kept their thermometers below 30°C.
Matias Reinoso, of the National Meteorological Service (SMN), explained to THE NATION: “These high temperatures are due to a situation of blockage in the atmosphere, produced by high pressures, in the middle levels of the troposphere over the central region of the country. This blockage has persisted these days and the peak of the wave has to do with the rotation of the wind to the north sector, which allowed the advance of that warm and humid air from lower latitudes”.
In addition, he linked the heat wave with the cyclical phenomenon La Niña: “It is one of the factors. It is known for generating periods of negative precipitation anomalies, that is, droughts, and it favors high temperatures.”
Melissa Panatella, SNM forecaster, pointed out that as of today temperatures would drop: “The blockade is being unblocked and next week the temperature will drop. The Sunday 32 ° C maximum is expected and for Monday, 23°C, which is 20°C less than today”.
“In the province of Buenos Aires, rainfall and isolated storms are expected from Saturday afternoon, and for Sunday, the entry of the cold mass from the southern sector towards the entire center of the country, which will generate the rotation of the winds from the sector. south and the drop in temperatures”, added Reinoso, and indicated that next week they will present maximum temperatures of 25°C and minimum below 20°C.
“It will be a fairly unstable week, because this mass of cold air will blow away the warm and humid air and will activate phenomena of greater intensity, such as rainfall and storms, throughout the central strip. But nothing significant is expected to imply any risk, “he added.
The experts pointed out that, according to statistics, summers in Argentina usually present between one and three heat waves. “This summer is expected to be a little warmer than the previous ones, according to the SMN’s quarterly climate forecast, but that does not imply that there will be more heat waves,” Reinoso explained.
“The La Niña phenomenon is forecast to continue, at least, until March, and it may be that there are other heat waves, but we do not know if they are as intense, because it changes continuously,” added Panatella.