Rio Grande do Sul — the window became an extratropical cyclone

On the board · September 19, 2026 →

EMERGING · September 19, 2026 · NO. 0919

THE RISK WINDOW

The Sep-19 danger window this page carried has verified and escalated. An extratropical cyclone forms on the Rio Grande do Sul coast Sep 19 into Sep 20 under an orange danger-storm level: rain to 100 mm a day, winds to 100 km/h and hail, with effects reaching Santa Catarina and Parana. A forecast that was a shaded window on Friday is a named feature with a wind figure today.

THE RECORD

7 turning points on record since Sep 8.

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

Supply chainsthe Kanto corridor under a Monday arrival, the Great-Lakes freight lanes under the weekend rain, and two Vietnamese logistics regions flooded at once

Maritimea typhoon crossing island ferry routes, an extratropical cyclone on a South American coast, and a marine alert count that is carrying most of an American board

Energyan evening load peak under a 108 °F index, wind and hail on two continents, and a river that is still a level rather than an event