Overview
- Argentina's Servicio Meteorológico Nacional issued orange and yellow warnings covering 15–16 provinces, and on Friday warned of cordillera snow of roughly 40–60 cm in high Andean sectors plus storms, hail and strong gusts in lowlands.
- Severe storms and hail have already hit the Buenos Aires metro area, and Chile reported an earlier storm that left fatalities, widespread power outages and flooding, prompting red alerts and evacuations.
- SMN forecasts include very strong westerly gusts in the high Andes (60–100+ km/h) and Zonda gusts in northwestern provinces, while Salta's civil‑defense agency declared extreme fire danger for Friday and Saturday and urged strict safeguards.
- Peru's Senamhi said the current El Niño is behaving unusually because of ocean warming and a Kelvin wave and warned the event could become one of the strongest on record and persist into early autumn 2027.
- Mexico and U.S. agencies are forecasting intense rains, heat and convective hazards tied to monsoonal and tropical activity, and forecasters warn the pattern's persistence could stress agriculture, water supplies and emergency services in coming months.