Overview

• Mexico’s national weather service forecast intense rainfall of 75–150 mm from Sept. 22–24 in Jalisco, Colima, Michoacán, Guerrero, Oaxaca, Chiapas and Veracruz, with risks of floods, landslides, hail and dangerous lightning.
• Conagua confirmed the formation of Tropical Storm Narda in the Pacific, with its interaction with the Mexican monsoon and a tropical wave boosting rain, strong winds and 2–3.5 m surf along Pacific coasts, as heat persists in parts of the north.
• Local guidance highlights urban timing: strong storms are expected in Guadalajara from around 16:00 with 40–60 km/h gusts and flooding risk, while CDMX is forecast for evening and late‑night showers with possible hail.
• Argentina’s SMN issued an orange alert for severe storms in northern Misiones and yellow alerts for storms in southern Misiones and Formosa, alongside wind advisories for coastal Buenos Aires, La Pampa, Santa Cruz and Tierra del Fuego.
• In Spain, early autumn brings the first snows in Picos de Europa and yellow alerts for rain and coastal conditions in Asturias and heavy showers in Bizkaia, as Córdoba holds near 30 °C under a stable ‘veroño’ pattern.