Topic: NOAA NESDIS / AWS Outage

Date/Time Issued: October 20, 2025 1327Z

Product(s) or Data Impacted: Most NOAA/NESDIS Products

Date/Time of Initial Impact: October 20, 2025 0657Z

Date/Time of Expected End: October 20, 2025 1200Z

Length of Event: 6 hours

Details/Specifics: Starting around 0657Z NOAA NCCF began receiving alarms for low ingest data on multiple products. This was traced to DNS failures in multiple AWS services in the US-

East 1 region (especially Dynamo DB, EC2, Lambda). AWS stated that the problems were identified and mitigated by 1035Z; however, a significant backlog of products remains to be processed, which is ongoing.

Virtually all NOAA/NESDIS products were affected. We expect that all products should eventually be restored; it appears that all data is delayed, not lost.

Contact for Further Information: ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880.

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