Overview

• São Paulo entered a citywide state of attention for flooding on Friday as Defesa Civil issued a severe rain alert, with reported inundation points, reduced speeds on CPTM Line 10 and about 1,200 km of traffic congestion.
• INMET kept broad alerts in effect for intense rain and strong gusts, with guidance noting 30–60 mm per hour or up to 100 mm per day and winds that could reach 60–100 km/h depending on the advisory.
• Meteorological agencies including Metsul, Climatempo and Nottus expect the cyclone to organize near Uruguay and Argentina from Sunday into Monday, with gusts potentially reaching 80–100 km/h in parts of the South and a risk of hail.
• Forecasts indicate storms will expand into Mato Grosso do Sul and São Paulo as the associated front advances, following a short-lived warmup in the capital on the holiday weekend.
• Heavy rain earlier in the week left high totals on the São Paulo coast, including 81.2 mm in Iguape, heightening concern for localized flooding where soils are saturated.