The Servicio Meteorológico Nacional issued a yellow-level weather alert for severe storms affecting Buenos Aires and the surrounding Conurbano region on Sunday, September 20. According to official forecasts, the pleasant spring-like conditions at the start of the day will give way to heavy precipitation, occasional hail, and strong gusts exceeding 70 km/h during the afternoon and evening.
Storm Timelines and Expected Rainfall Across AMBA
Private forecasts indicate that the initial precipitation could reach the AMBA zone starting at 13:00, according to data cited in the reports. The Servicio Meteorológico Nacional specifies that the area faces a 40 to 70 percent probability of storms with accumulated rainfall expected to range between 15 and 30 mm, though certain locations could exceed those totals. The agency warns that the severe weather will feature intense precipitation in short periods alongside strong winds.
Did You Know? The Servicio Meteorológico Nacional issued warnings spanning multiple provinces, noting that while the AMBA faces yellow-level storm alerts, regions such as the northwest of Buenos Aires province, southern Santa Fe, and parts of Córdoba and Entre Ríos fell under more severe orange-level alerts.
Weather Outlook for the Start of Spring and Student Day
The forecast for Monday, September 21, brings mixed conditions for individuals planning outdoor activities to celebrate the start of spring and Student Day. While no additional rainfall is expected for Monday, the Servicio Meteorológico Nacional warns that winds will pick up significantly during the afternoon. Authorities issued a yellow-level alert for the capital and surrounding areas, predicting sustained winds and gusts ranging between 50 and 80 km/h.
Temperatures on Monday will range from 12 to 17 degrees with some sunny breaks by midday, though mornings during the first week of spring will remain fresh. Minimum temperatures in the Capital Federal are projected to drop to 7 degrees on Tuesday and Wednesday, with even lower readings expected in the Conurbano. Maximum temperatures will climb gradually toward the end of the week, reaching 13 degrees on Tuesday, 17 degrees on Wednesday, 24 degrees on Thursday, and a peak of 27 degrees on Friday, with no further precipitation expected through Saturday.
Alerts Across Other Provinces and Cordilleran Regions
Severe weather conditions extend well beyond the Buenos Aires metropolitan area. The Servicio Meteorológico Nacional reported orange-level alerts for storms in the northwest of Buenos Aires province, the south of Santa Fe, and select zones of Córdoba and Entre Ríos. Yellow-level storm alerts also cover the remainder of Buenos Aires province, Entre Ríos, Córdoba, southeast San Luis, and northeast La Pampa.
Meanwhile, a yellow-level alert for strong winds covers the central strip of the country, impacting southern Buenos Aires province, southern Córdoba, La Pampa, Río Negro, Neuquén, northeast Chubut, southern San Luis, and large parts of Mendoza and San Juan. Further north, a Zonda wind alert affects Mendoza, San Juan, La Rioja, Catamarca, and Jujuy. Western portions of provinces bordering the Andes face yellow-level snow alerts, while eastern Patagonia experiences rain warnings ranging from yellow in northeast Chubut to orange in southeast Chubut and northeast Santa Cruz.
Frequently Asked Questions
What is the probability of storms hitting the AMBA region?
The Servicio Meteorológico Nacional places the probability of storms between 40 and 70 percent for Sunday afternoon and evening.
Will it rain on Monday, September 21, for the start of spring?
No new rainfall is expected for Monday, though the region remains under a yellow-level wind alert with gusts potentially reaching 80 km/h.
How will temperatures trend during the first week of spring?
Mornings will remain fresh with minimums dropping to 7 degrees in the Capital Federal on Tuesday and Wednesday, while maximum temperatures will rise progressively to reach 27 degrees by Friday.
Are you planning to alter your outdoor holiday plans due to the forecasted winds and storms?