Overview

• Argentina’s meteorological service issued yellow and orange alerts across Buenos Aires (incluido el AMBA), Córdoba, Santa Fe, La Pampa, Mendoza, San Luis, Entre Ríos and other provinces for Saturday night through Sunday.
• SMN guidance times the onset for Saturday night with peak instability on Sunday, warning of intense rainfall in short periods, electrical activity, occasional hail and strong gusts.
• Forecast accumulations vary widely, with broad ranges expected and local maxima projected to reach 120–150 mm in some areas, alongside gusts that could approach severe thresholds in parts of the interior.
• Local governments and civil defense units are activating contingency plans, from drain clearing and emergency crews in Córdoba and Mendoza to city-level alerts in Rosario that escalate from yellow on Saturday to orange on Sunday.
• Parallel advisories in Mexico cite monsoon and tropical-wave interactions bringing heavy rain, hail and high winds in multiple states, with CDMX maintaining color-coded alerts and drainage operations, and the federal SMN highlighting risks including flooding and isolated tornado potential in the north.