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

Date/Time Issued: April 22, 2025 1847 UTC

Product(s) or Data Impacted: Manual Dvorak Estimates in the South Indian 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) as of July 1, 2025. These estimates have been disseminated under WMO headers TXXS20 KNES through TXXS29 KNES. 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

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