Update #3: This is the 30 day reminder for the Termination of Satellite Analysis Branch’s Manual Dvorak Estimates in the South Indian and South Atlantic Ocean on July 1, 2025

Update #2: Please also note the WMO headers for the South Atlantic bulletins are TXST21 KNES through TXST29 KNES.

Update #1: In addition to the Termination of Satellite Analysis Branchs Manual Dvorak Estimates in the South Indian Ocean, The Satellite Analysis Branch’s Manual Dvorak Estimates in the South Atlantic Ocean will also be Terminated on July 1, 2025.

Topic: Termination of Satellite Analysis Branch’s Manual Dvorak Estimates in the South Indian and South Atlantic Ocean

Date/Time Issued: May 30, 2025 1400 UTC 

Product(s) or Data Impacted: Manual Dvorak Estimates in the South Indian  and South Atlantic Ocean (TXXS21 - TXXS29)

Date/Time of Initial Impact: July 1, 2025

Date/Time of Expected End: NA (Termination of Product)

Length of Impact: NA

Details/Specifics of Change:

The Satellite Analysis Branch will no longer produce manual Dvorak estimates in the South Indian Ocean (west of 135E longitude) and the South Atlantic Ocean as of July 1, 2025. These estimates have been disseminated under WMO headers TXXS20 KNES through TXXS29 KNES (South Indian Ocean) and TXST21 KNES through TXST29 KNES (South Atlantic Ocean) . Users are referred to Dvorak estimates issued variously by Regional Specialized Meteorological Centre (RSMC) La Reunion, the Bureau of Meteorology's Tropical Cyclone Warning Centres (TCWCs) in Perth and Darwin and the Joint Typhoon Warning Center.

Web Site(s) for applicable information: https://www.ospo.noaa.gov/products/ocean/tropical/

Contact Information for Further Information: Please email User Services at spsd.userservices@noaa.gov or Tropical Team Lead Mike Turk at michael.turk@noaa.gov