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NOUS41 KWBC 271945
PNSWSH
SERVICE CHANGE NOTICE 25-09
NATIONAL WEATHER SERVICE HEADQUARTERS SILVER SPRING MD
245 PM EST MON JAN 27 2025
TO: SUBSCRIBERS:
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS, USERS, AND EMPLOYEES
FROM: DAVE MICHAUD, DIRECTOR
NCEP CENTRAL OPERATIONS
SUBJECT: ENFORCE TLS 1.2 OR HIGHER ON NCEP HOSTED SITES:
EFFECTIVE JULY 8, 2025
EFFECTIVE ON OR ABOUT JULY 8, 2025, BEGINNING AT 1400
COORDINATED UNIVERSAL TIME (UTC), THE NATIONAL CENTERS FOR
ENVIRONMENTAL PREDICTION (NCEP) CENTRAL OPERATIONS (NCO) WILL BE
UPDATING AND IMPROVING THE CONFIGURATION FOR THE SECURE
PROTOCOLS USED ON NCO HOSTED WEBSITES AND APPLICATIONS. THESE
WEBSITES WILL NO LONGER SUPPORT LESS SECURE TRANSPORT LAYER
SECURITY (TLS) PROTOCOLS AND ASSOCIATED CIPHER SUITES BELOW TLS
1.2. THIS WILL PROVIDE A MORE SECURE BROWSING EXPERIENCE AND
WILL BRING US CLOSER IN LINE WITH NATIONAL INSTITUTE OF
STANDARDS AND TECHNOLOGY (NIST) SPECIAL PUBLICATION (SP) 800-52
REV. 2 GUIDANCE.
IN THE EVENT THAT THE IMPLEMENTATION DATE IS DECLARED A CRITICAL
WEATHER DAY (CWD), OR SIGNIFICANT WEATHER IS OCCURRING OR IS
ANTICIPATED TO OCCUR, IMPLEMENTATION OF THIS CHANGE WILL OCCUR
AT 1200 UTC ON THE NEXT WEEKDAY NOT DECLARED A CWD AND WHEN NO
SIGNIFICANT WEATHER IS OCCURRING.
THE CHANGES AFFECT THE DOMAIN NAMES LISTED BELOW (AND THE
CANONICAL NAME, OR C-NAME, NOT LISTED) FOR THE FOLLOWING
WEBSITES:
CFS.NCEP.NOAA.GOV
DENGUEFORECASTING.NOAA.GOV
FTP.EMC.NCEP.NOAA.GOV
FTPPRD.NCEP.NOAA.GOV
HYSPLIT.NCEP.NOAA.GOV
MADIS-DATA.NCEP.NOAA.GOV
MAG.NCEP.NOAA.GOV
MAGEVAL.NCEP.NOAA.GOV
MAGPARA.NCEP.NOAA.GOV
MRMS.NCEP.NOAA.GOV
POLAR.NCEP.NOAA.GOV
RADAR2PUB.NCEP.NOAA.GOV
RADAR3PUB.NCEP.NOAA.GOV
RSMC.NCEP.NOAA.GOV
TGFTP.NCEP.NOAA.GOV
WWW.CPC.NCEP.NOAA.GOV
WWW.CPCPARA.NCEP.NOAA.GOV
WWW.EMC.NCEP.NOAA.GOV
WWW.FTP.CPC.NCEP.NOAA.GOV
WWW.FTP.NCO.NCEP.NOAA.GOV
WWW.FTP.NHC.NCEP.NOAA.GOV
WWW.FTP.OPC.NCEP.NOAA.GOV
WWW.FTP.WPC.NCEP.NOAA.GOV
WWW.FTP.NCEP.NOAA.GOV
WWW.NCO.NCEP.NOAA.GOV
WWW.NDSC.NCEP.NOAA.GOV
WWW.OPAH.NCEP.NOAA.GOV
ANY BROWSERS OR SERVICES THAT MAKE USE OF NCO WEB SERVICES AND
DO NOT SUPPORT TLS 1.2 OR GREATER WILL NEED TO MAKE
MODIFICATIONS IN ORDER TO AVOID SERVICE INTERRUPTION. FOR
EXAMPLE, ONLY WGET-1.14 AND LATER SUPPORT HIGHER TLS VERSIONS.
WE WILL EVALUATE ANY FEEDBACK AND DECIDE WHETHER TO PROCEED. IF
YOU HAVE ANY QUESTIONS OR CONCERNS ABOUT THE DATA OR SERVICES
AFFECTED BY THIS CHANGE, PLEASE CONTACT:
SECURITY TEAM
NCEP CENTRAL OPERATIONS
SCOTT TIEPERMAN, ISSO
NCO NETWORK AND SECURITY BRANCH
NCEP.LIST.SECURITY@NOAA.GOV
NATIONAL SERVICE CHANGE NOTICES ARE ONLINE AT:
HTTPS://WWW.WEATHER.GOV/NOTIFICATION/
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