RIO GRANDE DO SUL — THE COASTAL EXTRATROPICAL CYCLONE REACHES ITS PEAK

On the board · September 20, 2026 →

PEAK · September 20, 2026 · NO. 0920

THE RISK WINDOW

Wind, water and hail on one footprint, peaking now. An extratropical cyclone on the Rio Grande do Sul coast Sep 19 to 20 under an orange danger-storm alert — rain to 100 mm/day or 30 to 60 mm/h, gusts of 60 to 100 km/h and hail, over Rio Grande do Sul, Santa Catarina and Parana. Wind, water and ice on one footprint at once; it peaks now and winds down after today.

THE RECORD

8 turning points on record since Sep 8.

Sep 19↑ intensified sharply

Sep 18active → emerging

Sep 17▽ slipped down the board

Sep 15easing → active · became confirmed

Sep 13▽ slipped down the board

Sep 12↑ moved up the board

Sep 11active → easing · eased sharply

Sep 8appeared, active

WHO IT TOUCHES

Maritimeisland ferries under a transitioning typhoon, a coastal cyclone in southern Brazil, and a strengthening bura on the Dalmatian coast

Energyan easing but still loaded evening peak, a distribution network under a holiday rain shield, and a river that constrains fuel movement