Overview

• Argentina’s meteorological service warns storms linked to the Santa Rosa event will develop from Saturday afternoon, Aug. 30, through Sunday, Aug. 31 across La Pampa, Córdoba, Santa Fe, Entre Ríos and Buenos Aires.
• Official guidance calls for short‑period rainfall of 40–70 mm, wind gusts near 50–60 km/h, frequent lightning and possible hail, with localized flooding and urban impacts considered likely.
• Provincial forecasts highlight local modifiers, including a cold front entering Mendoza on Saturday that will trigger storms and a sharp temperature drop, and stronger southerly gusts in Santiago del Estero on Sunday.
• Mexico’s Conagua/SMN projects on Aug. 28 very heavy to intense rain of 75–150 mm in parts of Oaxaca, Chiapas and Tabasco, and 50–75 mm in states such as Baja California Sur, Sonora, Sinaloa, Durango, Nayarit, Jalisco, Michoacán, Guerrero, Veracruz and Campeche.
• Authorities warn of landslides, rising rivers, flash flooding, dangerous crosswinds and reduced visibility in affected Mexican regions, with the Valley of Mexico expecting strong showers and thunderstorms later in the day.