Overview
- Argentina’s SMN keeps yellow alerts active across roughly 18–19 provinces for storms and heat, with forecasts of 20–70 mm of rain in short periods, frequent lightning, occasional hail and gusts near 70 km/h.
- Buenos Aires City holds an orange alert for extreme temperatures as AMBA endures a heat wave, with highs around 35–36 °C and official guidance on hydration, sun exposure and reduced exertion.
- Storm advisories cover Litoral, NOA and Cuyo provinces such as Corrientes, Misiones, Salta, Jujuy, Mendoza, San Luis, San Juan and Córdoba, with some cordillera zones expecting wintry precipitation and repeated thunderstorms through the week.
- Spain’s AEMET shifts from recent heavy eastern rain to an anticyclonic spell through Dec. 31 featuring fog and frosts, before Atlantic lows are expected to return from Jan. 1 with broader rainfall.
- Mexico’s weather service reports Cold Front No. 25 driving intense rains in Tamaulipas and Veracruz, very strong rainfall in Puebla and San Luis Potosí, a marked temperature drop and potential snow or ice on high peaks.