What was the last time it snowed in CABA, a “historic” phenomenon, according to the National Meteorological Service

What was the last time it snowed in CABA, a “historic” phenomenon, according to the National Meteorological Service
What was the last time it snowed in CABA, a “historic” phenomenon, according to the National Meteorological Service

What was the last time it snowed in CABA, a “historic” phenomenon, according to the National Meteorological Service (NA)

He July 9, 2007, Buenos Aires and the Buenos Aires suburbs dressed in white on a day considered historic. In full celebration of Independence Dayan unusual snowfall covered the entire city and its surroundings for more than ten consecutive hours.

The National Weather Service had predicted the possibility of snow, but the magnitude of the event exceeded expectations. Snowflakes began to fall around noon, slowly covering the streets, squares and parks of the city with a white blanket. The temperature dropped rapidly, reaching values ​​close to 0°C, an essential condition for snow accumulation.

The snowfall lasted for several hours, giving citizens a unique opportunity to enjoy games, photographs and the simple wonder of a snowy landscape. The local media carried out extensive coverage, highlighting the excitement and surprise of children and adults.

That day was marked as a special day in the history of Buenos Aires, remembered by many as a unique and almost magical experience. The snowfall of 2007 not only had a climatic impact, but also a social one, uniting the people of Buenos Aires in the amazement and joy of living an extraordinary moment.

He July 9, 2007 will be remembered as a historic day for the citizens of the Argentinian republic. Various towns in the north of the province of Buenos Airesas well as in the south of Santa Fe, Cordova, saint Louisthe north of Mendoza, San Juan, The Rioja and even in Catamarca, experienced snowfall for the first time in decades. This unusual weather phenomenon began around 10 a.m. in Morón, according to the National Metereological Service.

The temperature in Buenos Aires dropped rapidly, favoring the accumulation of snow for more than ten hours. (NA)

The heavy snowfall spread for about 10 hours. In the city of Buenos Airesthe snowfall was officially recorded at 3 p.m., when the rain turned into water-snow and finally into solid snow, with a temperature that dropped to 2.6°C and a thermal sensation of -1.2°C (29.8°F). This drop in temperature was decisive in turning the fallen water into snow and solid snow, according to meteorological experts.

He National Meteorological Service (SMN) explained the conditions that allowed this extraordinary snowfall. In the morning, temperatures in the City of Buenos Aires were around 4°C (39.2°F), insufficient for the snow to reach the ground solidly.

However, as the day wore on, the falling rain began to cool the air near the ground. Around 3:00 p.m., the temperature dropped to 2.6°C (36.7°F), with a wind chill of -1.2°C (29.8°F), eventually allowing snow to accumulate on the surface.

Prior to this notable snowfall, a few days before, a cold front followed by air of polar origin moved from Patagonia to the center of the country, causing minimum temperatures of up to -8°C (17.6°F) in the southwest of Santa Cruz. On July 7, a Pacific anticyclone reinforced cold air currents, resulting in heavy snowfall in the south of the country.

The historic snowfall of July 9, 2007 was witnessed and enjoyed by thousands of Buenos Aires residents. (NA)

Lucas Berengua, a prominent meteorologist, then analyzed the possibility of this phenomenon repeating itself in the future. According to his statements, “It could actually happen again.””. However, he highlighted that for this to occur, specific conditions are needed: a polar air mass with temperatures close to 0°C (32°F) both at the base of the cloud and on the ground, along with a high level of humidity and precipitation.

On July 8, the anticyclonic system completely entered national territory, generating easterly winds that brought great humidity from the ocean. This climatic phenomenon set the stage for what would happen on July 9, when very cold air from the mountain range moved towards central and eastern Argentina. At the same time, the anticyclone continued to inject cold, humid air, dominating all strata of the middle and lower atmosphere.

The media coverage of the 2007 snowfall recorded the excitement of Buenos Aires citizens regarding the phenomenon. (NA)

The meteorologists of the National Metereological Service They analyzed that the combination of factors, such as the low height of the cloud base and the intense cold in the atmosphere, allowed the formation of snow and its precipitation. Weak wind currents played a crucial role, allowing snowflakes to reach the ground without melting. “The combination of these factors favored the formation of a cloud cover with its base at a low height from the ground, but with sufficient vertical development to form snow inside and precipitate the flakes”the experts detailed.

Finally, Berengue pointed out that, although the snowfall in Buenos Aires in 2007 is an event that could be repeated, the necessary conditions are rare and complex to achieve. As she explained it, “requires that the polar air mass have certain characteristics that are difficult to find in the Río de La Plata area.”

The first snowfall recorded in the Autonomous City of Buenos Aires occurred on June 22, 1918. This climatic event turned out to be an extraordinary phenomenon for the people of Buenos Aires, since the city does not usually experience meteorological conditions conducive to snow due to its geographical location. and its temperate climate.

The snowfall of June 22, 1918 was the first event of this type recorded in Buenos Aires. (NA)

The day began with a considerable drop in temperatures, a rare phenomenon for Buenos Aires winters. However, the combination of a low pressure system and a cold, humid air mass favored precipitation in the form of snow. The spectacle surprised both residents and visitors, who enjoyed an unusual landscape: streets, buildings and squares covered in a white blanket.

The snowfall intensified during the early morning hours and continued for much of the day, leaving a significant accumulation of snow. This snowfall was not only notable for its rarity, but also for its duration and intensity, unusual characteristics in the region.

 
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