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NOUS41 KWBC 291655
PNSWSH
SERVICE CHANGE NOTICE 26-10
NATIONAL WEATHER SERVICE HEADQUARTERS SILVER SPRING MD
1155 AM EST THU JAN 29 2026
TO: SUBSCRIBERS
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS, USERS AND EMPLOYEES
FROM: CLINTON WALLACE
DIRECTOR, SPACE WEATHER PREDICTION CENTER
SUBJECT: FORMAT CHANGE OF THE SPACE WEATHER PREDICTION CENTER
(SWPC) 45-DAY AP AND F10.7CM FLUX FORECAST EFFECTIVE MARCH 1,
2026
EFFECTIVE MARCH 01, 2026, THE NWS SPACE WEATHER PREDICTION
CENTER (SWPC) WILL REPLACE THE CURRENT USAF 45-DAY AP AND F10.7
FLUX FORECAST(HTTPS://SPACEWEATHER.GOV/PRODUCTS/USAF-45-DAY-AP-
AND-F107CM-FLUX-FORECAST) WITH AN SWPC-PRODUCED TEXT PRODUCT AND
A CORRESPONDING FILE IN JSON FORMAT (
HTTPS://SERVICES.SWPC.NOAA.GOV/PRODUCTS/). BOTH THE TEXT AND
JSON PRODUCTS WILL BE UPDATED DAILY AT [00:30 UTC],
INCORPORATING THE LATEST 7-DAY AP AND F10.7 FORECASTS GENERATED
BY THE SWPC FORECAST OFFICE.
THE FILE CURRENTLY DISPLAYED ON THE SWPC WEBSITE IS PRODUCED BY
THE U.S. SPACE FORCE (USSF) AND THE INDICES CONTAINED IN THAT
FILE ARE INCONSISTENT WITH SWPC’S OFFICIAL FORECASTS.
NUMEROUS USERS IN THE SATELLITE INDUSTRY HAVE CONTACTED SWPC TO
REPORT ISSUES WITH THE EXISTING FILE. TO BETTER SERVE THE
SATELLITE INDUSTRY AND OTHER USERS, SWPC WILL REPLACE THE
CURRENT FILE WITH PROPERLY GENERATED DAILY PRODUCTS THAT PROVIDE
ACCURATE AND RELIABLE FORECAST INFORMATION.
FOR QUESTIONS AND COMMENTS, PLEASE CONTACT:
TZU-WEI FANG
SPACE SCIENTIST
NOAA SPACE WEATHER PREDICTION CENTER
BOULDER, CO
EMAIL: TZU-WEI.FANG@NOAA.GOV
NATIONAL SERVICE CHANGE NOTICES ARE ONLINE AT:
HTTPS://WWW.WEATHER.GOV/NOTIFICATION/
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