Overview

• Tropical Storm Narda formed offshore Guerrero and Michoacán with sustained winds near 65 km/h and gusts to 75 km/h, with bands already enhancing rainfall on the Pacific coast.
• SMN forecasts very strong to intense totals of 75–150 mm from September 22–24 in Jalisco, Colima, Michoacán, Guerrero, Oaxaca, Chiapas, Veracruz and Tabasco, with strong rains in Puebla and Campeche.
• Hazards include river and arroyo rises, urban flooding and landslides, frequent lightning and hail, reduced road visibility, coastal winds of 40–60 km/h and Pacific surf of 2–3.5 meters.
• The Mexican monsoon, several low‑pressure channels, subtropical jet moisture and approaching tropical wave 34 will also drive showers and storms across Baja California, Sonora, Chihuahua, Durango, Sinaloa, Nayarit, the center and the southeast.
• Separately, Mexico’s SMN projects 48 cold fronts for the 2025–2026 season, while Peru’s Senamhi flags a warm, sunnier spell in Lima this week and Argentina’s SMN issues storm and wind alerts, including an orange warning for northern Misiones.