# Extreme cold wave and storm alerts in Argentina and Paraguay > Live situation record from CLSTR: https://clstr.news/situations/low-temperature-alerts-in-buenos-aires-province > Updated: 2026-09-11T01:36:25.000Z. Sources: 125. Developments: 9. The extreme cold wave driven by an Antarctic air mass has continued to impact Argentina and has now extended into parts of Paraguay. The National Meteorological Service (SMN) has issued yellow alerts for extreme cold and strong winds across numerous Argentine provinces, including Buenos Aires, Entre Ríos, Corrientes, Misiones, Santa Fe, Córdoba, San Luis, Mendoza, Neuquén, and La Pampa. Severe late-season frosts have hit rural northern Buenos Aires Province, where temperatures reached as low as -6.1°C. In Berdier, a temperature of -4.5°C matched a 60-year low for September. These unusual conditions prompted emergency measures from fruit growers in San Pedro, such as burning wood between trees to protect blossoms. While wheat, corn, and pea crops are on alert, specialists from INTA suggest wheat may avoid critical damage as many plots are in the tillering stage. In Uruguay, freezing conditions have spread to the Lavalleja department, which recorded -4.2°C, and Florida, which reached -3°C, raising concerns regarding fog and agricultural frost. Forecasts indicate ongoing instability. In Concepción del Uruguay, Argentina, temperatures are expected to rise temporarily before a new cold air mass arrives late in the week, bringing wind gusts and a sharp decline in temperatures. In Tucumán, storms and rain are expected, with potential light snow in mountainous areas above 2,500 meters. The Buenos Aires Metropolitan Area (AMBA) is also expected to see rising temperatures followed by light rain and a cold front by the weekend. Recent severe weather, including snow and ice, has caused significant travel disruptions. In Neuquén, multiple provincial routes have been declared impassable, particularly in the Andean zone, including Provincial Route 62 near San Martín de los Andes and Route 26 between Caviahue and Copahue. ## Claims - A cold front is causing significant temperature drops and adverse weather across various Argentine provinces. (corroborated by 25 sources) - Snowfall is expected in high-altitude areas of Mendoza and Neuquén. (corroborated by 6 sources) - Strong winds and Zonda winds are forecasted for several provinces including Catamarca and San Juan. (corroborated by 6 sources) - Extreme cold alerts are in effect for Entre Ríos and other regions. (corroborated by 5 sources) - Wind gusts in Neuquén and Río Negro could reach 100 km/h. (corroborated by 4 sources) - Bajada Nueva in San Luis recorded a minimum temperature of -6.5°C. (single source) - Ushuaia is under a yellow alert for winds with gusts up to 70 km/h. (single source) - Malargüe, Mendoza, recorded one of the lowest temperatures in the country at -1.4°C during the afternoon. (single source) - Snowfall is possible in the high-altitude areas of Tucumán. (single source) ## Timeline ### 2026-09-11: Weather alerts trigger road closures and safety controls in Argentina Snow and ice have caused road closures in Neuquén and prompted increased transport safety controls at the San Sebastián border crossing in Tierra del Fuego, Argentina. 3 sources. https://clstr.news/cluster/weather-alerts-trigger-road-closures-and-safety-controls-in-argentina ### 2026-09-09: South American regions face storms and temperature shifts Unstable weather patterns are bringing storms, rain, and temperature shifts across parts of Argentina and Chile, including electrical storms in central Chile and varied precipitation in Tucumán and Buenos Aires 9 sources. https://clstr.news/cluster/buenos-aires-weather-forecast-predicts-dry-cool-conditions ### 2026-09-08: Temperature shifts and freezing conditions reported in Argentina and Uruguay Cold fronts and temperature shifts are impacting Argentina and Uruguay, with freezing temperatures recorded in Lavalleja and a significant thermal drop expected in Concepción del Uruguay. 11 sources. https://clstr.news/cluster/temperature-shifts-and-freezing-conditions-reported-in-argentina-and-uruguay ### 2026-09-07: Buenos Aires province hit by severe late-season frosts Severe late-season frosts in northern Buenos Aires, Argentina, have reached temperatures as low as -6.1°C, prompting emergency measures from farmers to protect fruit and grain crops. 3 sources. https://clstr.news/cluster/buenos-aires-province-hit-by-severe-late-season-frosts ### 2026-09-06: Global weather patterns show extreme frost, heat, and heavy rain Global weather reports indicate diverse conditions: frost alerts in Argentina, temperature drops and rain in Spain, and heavy rainfall warnings in Mexico. 44 sources. https://clstr.news/cluster/argentina-faces-intense-polar-air-mass-and-widespread-frost ### 2026-09-04: South America weather: Polar air mass triggers extreme cold and wind alerts A polar air mass is bringing extreme cold, snow, and high winds across Argentina, parts of Chile, and Paraguay, triggering multiple weather alerts for wind and freezing temperatures. 60 sources. https://clstr.news/cluster/extreme-weather-alerts-issued-for-argentina-and-spain ### 2026-09-02: Argentina weather alerts issued for storms, wind, and temperature drops Argentina faces widespread weather alerts, including storms in Buenos Aires and Entre Ríos, strong winds in Santiago del Estero and Chubut, and a significant temperature drop across much of the country. 21 sources. https://clstr.news/cluster/argentina-weather-alerts-issued-for-storms-in-entre-ros-and-buenos-aires ### 2026-08-31: Argentina weather: Polar wave brings sharp temperature drop A polar wave is bringing a sharp temperature drop to much of Argentina, with Buenos Aires and the Pampean region facing winter-like lows, while northern areas remain temperate. 12 sources. https://clstr.news/cluster/argentina-weather-cold-front-hits-amba-while-santiago-del-estero-remains-mild ### 2026-08-24: Low temperature alerts issued for Pilar and La Plata Low temperature alerts are in effect for Pilar, Argentina, while La Plata prepares for a gradual warming trend starting Wednesday following a period of extreme cold. 3 sources. https://clstr.news/cluster/low-temperature-alerts-issued-for-pilar-and-la-plata --- Cite as: Extreme cold wave and storm alerts in Argentina and Paraguay. CLSTR, https://clstr.news/situations/low-temperature-alerts-in-buenos-aires-province