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3h ago

Centro‑Sul Faces Return of Storms and Strong Winds This Weekend

A shift in atmospheric patterns, marked by an intensified low‑level jet alongside an approaching frontal and cyclonic system, is raising moisture and boosting the risk of heavy rain, gusty winds and hail in targeted areas.

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Overview

  • As of Saturday, national and local agencies have active warnings for the weekend with Paraná under an Inmet orange alert for Saturday that forecasts up to 100 km/h winds and possible hail.
  • Vale do Ribeira is in an Inmet orange alert that warns of 50–100 mm of rain per day, 60–100 km/h gusts and risks of flooding, power cuts and damage to crops and structures.
  • Porto Alegre and its metropolitan region face forecasts of heavy rain and elevated flood risk from Saturday through Monday, and Defesa Civil is urging people to avoid riverbanks, slopes and flooded streets.
  • Mato Grosso do Sul will see extreme daytime heat around 38–39°C before conditions turn unstable over the weekend with thunderstorms, lightning and gusts of 50–70 km/h that can bring sudden downpours.
  • Meteorologists say the pattern—a weakened earlier moisture channel plus a stronger Jato de Baixos Níveis and a developing offshore cyclone—explains why the South may stay cold with frost while nearby areas get severe storms, and analysts note a stronger El Niño risk could shape rainfall beyond the weekend.