In December 2026, Integrated Center for Aeronautical Meteorology set to become a TC Advisory Center for South Atlantic

[Hurricanehink]

The establishment of a Tropical Cyclone Advisory Centre (TCAC) in Brazil represents a significant step forward in monitoring the southern portion of the Atlantic Ocean, an area within
Brazilian -controlled airspace. Although no hurricanes have been reported in the region since Hurricane Catarina in 2004, tropical depressions and storms (stages that precede the formation of a hurricane) have occurred quite frequently over the last twenty years... From 7 to 9 April 2025, a delegation from Brazil carried out an operational exchange at the Tropical Cyclone Advisory Centre (TCAC) in Miami, with the objective of understanding the infrastructure, staffing practices, and forecasting techniques employed in providing the meteorological service for forecasting and monitoring hurricanes in the North Atlantic

- https://www.icao.int/sites/default/files/Meetings/a42/Documents/WP/wp_252_en.pdf

During the 42nd Session of the Assembly of the International Civil Aviation Organization (ICAO), held from 23 September to 03 October 2025, Brazil formally presented its proposal to establish a Tropical Cyclone Advisory Center (TCAC) for monitoring the Western South Atlantic, aiming to enhance air navigation safety in the region. The Assembly welcomed the proposal, recognizing Brazil's capacity to fill this existing gap in the global meteorological watch system... Brazil has established December 2026 as the target date for the TCAC to become fully operational. To meet this deadline, CIMAER, the institution designated to host the TCAC, is developing the Operational Model, defining the workflow for the detection, analysis, and dissemination of Tropical Cyclone Advisories (TCA). The establishment of TCAC Rio de Janeiro represents a strategic contribution to the ICAO SAM Region by addressing a long-standing gap in tropical cyclone advisory coverage in the Western South Atlantic for aviation purposes, in accordance with ICAO and WMO provisions.

- https://www.icao.int/ru/filebrowser/download/42026?fid=42026

I hadn't seen this discussed anywhere, especially since there is a system off Brazil today. It looks like December 2026 is when the South Atlantic becomes an official tropical cyclone basin, if all goes to schedule.

[WaveBreaking]

Yeah this is a very big deal and I’m surprised more people aren’t talking about this.

I wonder what intensity scale they’ll use for the SATL. My guess is probably the Saffir-Simpson scale.

[ljmac75]

This is good news, even if such systems aren't common it's good to have a plan in place for them. I still remember when they initially refused to recognize Catarina down there. Now if only there was an official one for those tropical(?) cyclones in the Mediterranean...