Overview
- Mexico’s National Weather Service forecasts Cold Front No. 26 entering the north and northeast on Sunday with strong wind gusts and a sharp temperature drop, while a second front reaches the northwest and brings wind and showers to Baja California.
- Mexico City’s risk agency activated a Yellow Alert for early January 4 in six boroughs with lows of 4–6°C and public guidance for vulnerable groups.
- Nuevo León is projected to see minimums of -5 to 0°C with frost risk and winds gusting 30–50 km/h, according to the federal forecast.
- Argentina’s San Juan remains under an orange heat alert with highs near 34–35°C, signaling moderate to high health risk and recommended precautions.
- Salta and Jujuy hold yellow storm alerts warning of isolated to locally strong thunderstorms with hail, intense lightning, gusts up to about 70 km/h and 20–55 mm of rain, and Salta reported power interruptions linked to recent heat-driven demand and wind damage.