Overview
- National forecasts and climate models are projecting a strong Antarctic or polar air intrusion for mid‑June that media have labeled a “bomba antártica,” and officials describe the outlook as preliminary and subject to change.
- The Servicio Meteorológico Nacional and model ensembles flag southern and Andean provinces—including Santa Cruz, Chubut, Río Negro, Neuquén, La Pampa, Mendoza, San Luis and southern Buenos Aires—as most likely to feel the cold first.
- Projected impacts include Patagonia nighttime lows near or below −10°C and central Argentina locations falling to around or below 0°C, with snow possible over mountain and cordillera areas if model trends hold.
- The SMN has also issued operational local warnings, most immediately a yellow wind alert affecting Neuquén that warns west winds of roughly 40–60 km/h with gusts that can exceed 90 km/h, and authorities advise taking precautions.
- Forecasters stress significant uncertainty in timing and extent, explain that “bomba antártica” is a colloquial term for a rapid polar surge driven by Antarctic or South Pacific high pressure, and urge close monitoring of updated SMN advisories because impacts to agriculture, roads and mountain passes could follow changes in model guidance.