Fwd: [Data Service Announce] Important: Changes to NOAA NEXRAD AWS Archive

[Mathew Biddle - NOAA Federal]

FYI, for those using NEXRAD Level II data from AWS S3.

---------- Forwarded message ---------
From: Unidata Support <sup...@unidata.ucar.edu>
Date: Mon, Aug 11, 2025 at 12:05 PM
Subject: [Data Service Announce] Important: Changes to NOAA NEXRAD AWS Archive
To: <data-servi...@unidata.ucar.edu>

Since the launch of the archive in 2015, NSF Unidata has been working with the NOAA Open Data Dissemination program (NODD) to populate the archive as new NEXRAD Level II data become available. Beginning in August 2025, we will be changing the AWS S3 bucket that contains up-to-date NEXRAD Level II archive data, affecting how users access the data via AWS. These changes are being made at the request of the AWS Open Datasets team in order to simplify account management for the bucket.

The NEXRAD Level II AWS archive is now available under the name unidata-nexrad-level2, with the url https://unidata-nexrad-level2.s3.amazonaws.com/index.html. Users of the bucket only need to update the bucket name in code and API requests from noaa-nexrad-level2 to unidata-nexrad-level2. The pattern used to create object filenames and the format of the data within the bucket remain unchanged.

Users of the SNS notification topic for new data arriving in the bucket need to update the account number for the topic (from 811054952067 to 684042711724), leaving the topic name unchanged. As a result, the AWS Resource Name (ARN) for the SNS topic changes to arn:aws:sns:us-east-1:684042711724:NewNEXRADLevel2Archive.

See NEXRAD on AWS for additional details.

Other NSF Unidata-managed NEXRAD AWS buckets (unidata-nexrad-level2-chunks and unidata-nexrad-level3) and their associated SNS topics are unaffected.

We plan to discontinue updates to the legacy bucket noaa-nexrad-level2 on September 1, 2025. If you have questions about switching your access to the new bucket, please contact support...@unidata.ucar.edu for assistance. 

Thanks for your attention,

The NSF Unidata Program Center staff

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--

Mathew Biddle, Physical Scientist
NOAA/NOS
US Integrated Ocean Observing System Office
1315 East-West Highway
Silver Spring MD 20910

240-533-9470

ORCiD: 0000-0003-4897-1669

http://www.ioos.noaa.gov/