Cold Front and Anticyclone Trigger Widespread Storms and Strong Gusts Across Brazil

Overview

• The frontal system interacting with an anticyclonic circulation has produced widespread instability and convective storms across Brazil, generating rapid swings between heat and heavy rain.
• Inmet has issued multiple yellow and orange alerts, including a tempestade warning for 31 municipalities in southern Espírito Santo that warns of heavy rain, 40–60 km/h winds, and possible hail.
• Measured impacts include an 89 km/h wind gust at the UFJF Inmet station in Juiz de Fora on Thursday that toppled trees, damaged poles and left about 5,000 urban customers and nearly 500 rural customers without power.
• Forecasters from Inmet and private services expect continued risk of strong gusts (rajadas up to about 70 km/h in many areas), localized flooding and landslides where soils are saturated over the next days.
• NOAA’s late‑September outlook indicating a likely La Niña this spring provides seasonal context because La Niña tendencies can raise the frequency of frontal incursions and heavy‑rain corridors in the South and Southeast.