Overview

• Official SMN guidance shows rain beginning Friday in La Pampa, Río Negro and Neuquén, then spreading north on Saturday and reaching Buenos Aires and CABA by the afternoon.
• On Sunday, precipitation is expected to shift toward the northeast, affecting Buenos Aires, CABA, San Luis, Córdoba, Santa Fe, Entre Ríos, Corrientes, Chaco, Formosa and Santiago del Estero.
• Mendoza’s agriculture and contingencies office confirms local rain, southerly winds and cordillera snow from Aug. 29–31, with about 9°C/14°C on Saturday and 6°C/12°C on Sunday.
• The SMN says only episodes with lightning or thunder, intense showers or snow or hail, and strong winds meet the threshold for a “Santa Rosa” storm.
• SMN records indicate storms near the date in roughly 57% of years, and analyses emphasize that impacts vary by region, more often in eastern and central Argentina.