674
NOUS72 KNES 171543
ADMNES
UPDATE #2: THIS IS A CORRECTION FOR THE SUBJECT LINE IN UPDATE #1.

UPDATE #1: THIS SERVES AS THE 1 MONTH REMINDER FOR THE TERMINATION OF
SATELLITE ANALYSIS BRANCH`S MANUAL DVORAK ESTIMATES ON SEPTEMBER 8, 2026.

TOPIC: TERMINATION OF SATELLITE ANALYSIS BRANCH`S MANUAL DVORAK ESTIMATES

DATE/TIME ISSUED: AUGUST 12, 2026 1403 UTC



PRODUCT(S) OR DATA IMPACTED: MANUAL DVORAK ESTIMATES FOR THE SOUTH PACIFIC
(TXPQ20 KNES - TXPQ29 KNES), NORTHWEST PACIFIC (TXST20 KNES - TXST29 KNES),
AND NORTH INDIAN OCEAN (TXPS20 KNES - TXPS29 KNES)

DATE/TIME OF INITIAL IMPACT: SEPTEMBER 8, 2026 0000 UTC



DATE/TIME OF EXPECTED END: NA (TERMINATION OF PRODUCT)



LENGTH OF IMPACT: NA



DETAILS/SPECIFICS OF CHANGE:

ORIGINALLY DEVELOPED BY VERNON DVORAK BETWEEN 1969 AND 1984, THIS MANUAL
TECHNIQUE IS USED TO DETERMINE TROPICAL CYCLONE INTENSITY - INCLUDING
TROPICAL DEPRESSIONS, TROPICAL STORMS, AND MAJOR TYPHOONS OR
HURRICANES - RELYING SOLELY ON VISIBLE AND INFRARED SATELLITE IMAGERY.

THIS SERVES AS THE 60-DAY NOTICE THAT THE GENERATION OF MANUAL DVORAK
ESTIMATES BY THE SATELLITE ANALYSIS BRANCH FOR THE SOUTH PACIFIC, NORTHWEST
PACIFIC, AND NORTH INDIAN OCEAN WILL BE DISCONTINUED EFFECTIVE SEPTEMBER
10, 2026. USERS ARE ADVISED TO TRANSITION TO ALTERNATIVE ESTIMATES PROVIDED
BY NOAA`S NATIONAL WEATHER SERVICE, THE DEPARTMENT OF WAR (DOW), AND OTHER
REGIONAL SPECIALIZED METEOROLOGICAL CENTERS (RSMCS).

PLEASE REFER TO THE TABLE BELOW FOR DETAILS ON WHERE TO OBTAIN ALTERNATIVE
DVORAK ESTIMATES:

BASIN

CONTINUING SOURCES OF DVORAK ESTIMATES

SOUTH PACIFIC

SAB PLANNED TERMINATION DATE OF SEPTEMBER 8, 2026

JTWC, RSMC NADI, RSMC HONOLULU (CPHC), TCWC DARWIN, TCWC BRISBANE,

TCWC PORT MORESBY, TCWC WELLINGTON

SOUTH INDIAN

 SAB TERMINATED DVORAK ESTIMATES ON  JULY 1, 2025

JTWC, RSMC LA REUNION, RSMC NEW DELHI, TCWC PERTH, TCWC DARWIN,

TCWC JAKARTA

NORTH INDIAN

SAB PLANNED TERMINATION DATE OF SEPTEMBER 8, 2026

JTWC, RSMC NEW DELHI

WEST PACIFIC

SAB PLANNED TERMINATION DATE OF SEPTEMBER 8, 2026

JTWC, RSMC TOKYO, RSMC NEW DELHI, TAIWAN WEATHER BUREAU

CENTRAL PACIFIC

SAB TERMINATED DVORAK ESTIMATES ON MAY 10, 2026

RSMC HONOLULU (CPHC),  JTWC

EAST PACIFIC

SAB TERMINATED DVORAK ESTIMATES ON MAY 10, 2026

TROPICAL ANALYSIS AND FORECAST BRANCH (NOAA/NWS/NATIONAL HURRICANE CENTER)

NORTH ATLANTIC

SAB TERMINATED DVORAK ESTIMATES ON MAY 10, 2026

TROPICAL ANALYSIS AND FORECAST BRANCH (NOAA/NWS/NATIONAL HURRICANE CENTER)


WEB SITE(S) FOR APPLICABLE INFORMATION:

HTTPS://WWW.OSPO.NOAA.GOV/PRODUCTS/OCEAN/TROPICAL/

HTTPS://WWW.NHC.NOAA.GOV/

HTTPS://WWW.METOC.NAVY.MIL/JTWC/JTWC.HTML


CONTACT INFORMATION FOR FURTHER INFORMATION: PLEASE EMAIL USER SERVICES AT
SPSD.USERSERVICES@NOAA.GOV OR TROPICAL TEAM LEAD PAUL LEE AT
PAUL.LEE@NOAA.GOV

THIS MESSAGE WAS SENT FROM ESPC.NOTIFICATION@NOAA.GOV. YOU HAVE BEEN SENT
THIS AND OTHER NOTIFICATIONS BECAUSE YOU HAVE OPTED IN TO RECEIVE IT. IF
FOR ANY REASON, YOU WISH TO UNSUBSCRIBE, PLEASE CONTACT ESPC HELP DESK AT
ESPCOPERATIONS@NOAA.GOV OR (301) 817-3880. PLEASE NOTE: IT MAY TAKE UP TO
TWO BUSINESS DAYS TO PROCESS YOUR UNSUBSCRIBE REQUEST.

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