Argentina's National Meteorological Service (SMN) placed Buenos Aires, Santa Fe, Córdoba, Entre Ríos, La Pampa and Río Negro under an orange storm alert on Wednesday, October 7, 2026, with 13 provinces under some level of weather warning, including a yellow alert for San Luis. Forecasters warned of 50–80 mm of rain, hail and wind gusts of 42–50 km/h, and street flooding was already reported in central Rosario and several Buenos Aires suburbs.
Argentina's National Meteorological Service (Servicio Meteorológico Nacional, SMN) raised its alert to orange — the second-highest level on its scale — for the Buenos Aires metropolitan area (AMBA) and parts of four other provinces on Wednesday, October 7, 2026, as a line of severe thunderstorms moved across the center of the country, according to La Nación.
The orange alert covered the City of Buenos Aires, northern Buenos Aires province, southern Entre Ríos, Córdoba, Santa Fe and northwestern La Pampa, with Río Negro also flagged for persistent rainfall, Infobae reported. In total, some level of storm or rain warning was in effect in 13 provinces that day.
Where the alerts applied
SMN alert levels and rainfall forecasts, October 7, 2026
Area
Alert level
Expected rainfall
AMBA (Buenos Aires city + suburbs)
Orange
Around 20 mm accumulated, rising through the afternoon
Rosario / Santa Fe
Yellow (morning/night), Orange (afternoon)
20–50 mm morning/night; 50–80 mm afternoon, locally more
Córdoba, Entre Ríos, La Pampa, Río Negro (core)
Orange
50–80 mm, with higher localized totals possible
Chaco, Corrientes, Santiago del Estero, San Luis, Neuquén, Chubut, La Rioja
Yellow
20–50 mm; wind gusts potentially above 60 km/h in some areas, per Infobae
Northeastern Argentina (Misiones, Formosa) — separate from the 13-province alert list
Not assigned a color in the sources reviewed
Could exceed 100 mm in some spots (Posadas around 160 mm, Formosa around 80 mm), per La Nación
Along with rain, the SMN warned of hail, frequent lightning and wind gusts of 42–50 km/h in and around Buenos Aires, with gusts topping 60 km/h possible elsewhere, Infobae said.
Flooding reported in Rosario and Buenos Aires suburbs
In Rosario, a morning storm flooded streets in the city center, including the intersection of San Luis and Corrientes, and dropped hail over the northern and northwestern neighborhoods of Azcuénaga and Belgrano, El Litoral reported. The nearby towns of Roldán, Pérez, Ibarlucea, Ricardone, Armstrong and Marcos Juárez were also affected, and in Funes, Calle Jujuy was blocked by floodwater.
Hay que seguir muy atentos, va a ser una jornada compleja.
— Gonzalo Ratner, Defensa Civil de Rosario (cited by El Litoral)
In Greater Buenos Aires, rain and wind above 40–50 km/h began hitting the metropolitan area around 12:30 p.m. local time on Wednesday, with La Matanza, Pilar, Merlo and Lanús among the hardest-hit districts, La Nación reported. The SMN also listed Berisso, Brandsen and Cañuelas among the affected municipalities in Buenos Aires province.
Core farm belt faces planting delays
The storms also struck Argentina's so-called región núcleo — the grain belt spanning Córdoba, Santa Fe, Entre Ríos, Buenos Aires and La Pampa — bringing hail and strong gusts on top of the rain, according to Agrolatam.
Agrolatam noted that how the rain falls matters as much as how much falls: short, intense bursts raise the risk of waterlogging in low-lying fields, surface runoff and road damage, which can restrict machinery access. The outlet said the unsettled pattern, expected to last through Friday, October 9, could extend delays to spring planting in parts of the region.
What happens next
La Nación reported that unstable, rainy conditions were expected to persist across the AMBA through Thursday, October 8, with improvement beginning Friday, October 9, before rain possibly returns on Saturday morning. Temperatures were forecast to stay cool, between 12°C and 18°C, through the weekend.
Authorities cited by La Nación advised residents to stay indoors unless travel was necessary, avoid contact with electrical installations during storms, secure loose objects outdoors, and drive with caution; El Litoral added that drivers should slow down and avoid flooded roads.
What is not yet known
None of the reports reviewed described injuries, deaths or an official damage tally as of Wednesday; the alerts and early flooding reports describe an ongoing, developing event rather than a concluded one. Final rainfall totals, the extent of crop or infrastructure damage, and any emergency declarations had not been confirmed by the SMN or provincial Defensa Civil offices in the sources available at the time of writing.
Questions
Which areas are most affected by the storms?
The Buenos Aires metropolitan area (AMBA), the city of Rosario and surrounding Santa Fe towns, and the core farming provinces of Córdoba, Entre Ríos, Buenos Aires, La Pampa and Río Negro are under the highest alert levels, according to the SMN as reported by La Nación, El Litoral and Infobae.
How much rain is expected?
Forecasters cited by La Nación, El Litoral and Infobae pointed to 50–80 mm in the hardest-hit central areas, with parts of northeastern Argentina (Misiones, Formosa) potentially exceeding 100 mm, per La Nación; Rosario's morning totals were lower, at 20–50 mm, before rising in the afternoon.
How long will the bad weather last?
La Nación reported that instability continues through Thursday, October 8, with improvement starting Friday, October 9, and a possible return of rain on Saturday morning.
Has anyone been hurt or killed?
The sources reviewed for this article did not report any injuries or deaths as of Wednesday, October 7, 2026; official damage assessments had not yet been published.
What should residents do during the storms?
Authorities cited by La Nación and El Litoral recommended staying indoors when possible, avoiding electrical installations during lightning, securing loose outdoor objects, and driving slowly while avoiding flooded streets.
How the world is telling it
SpanishArgentine outlets (La Nación, Infobae, El Litoral, Agrolatam) frame the event primarily as a service-journalism weather story, detailing SMN alert levels, province-by-province rainfall forecasts and practical safety advice, alongside separate coverage of the risk to spring planting in the core farm belt.
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