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 <https://registry.opendata.aws/noaa-nexrad/> 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-level2@xxxxxxxxxxxxxxxx for assistance.
Thanks for your attention,
The NSF Unidata Program Center staff
