File:Helene 2024 Wind History.png : Soft.lk - A Premium Software Developers - Meet one of the most powerful and intuitive POS systems for retail in Sri Lanka

As a file created by an employee of the NWS (formerly USWB) in the course of their official duties, whether hosted

on weather.gov
on an NWS sub-branch website including: cpc.ncep.noaa.gov, nhc.noaa.gov, swpc.noaa.gov, spc.noaa.gov, tsunami.gov, wpc.ncep.noaa.gov
on an NWS or sub-branch social media channel (such as Facebook, X or YouTube)
elsewhere (for example, an ArcGIS StoryMap on storymaps.arcgis.com)
in Monthly Weather Review (MWR) 1873–1973, currently hosted on the American Meteorological Society's website (journals.ametsoc.org)

Warnings:

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Use of the NWS name ("National Weather Service") and/or visual identifier are protected under trademark law and may not be used without permission from the NWS. NWS disclaimer
NWS websites host a large number of files created by members of the public or other third parties. These are not necessarily in the public domain.
Third parties producing copyrighted works consisting predominantly of the material appearing in NWS webpages must provide notice with such work(s) identifying the NWS material incorporated and stating that such material is not subject to copyright protection.17 U.S.C. § 403 NWS disclaimer
Monthly Weather Review was created and published solely by the USWB/NWS until the end of 1973. Starting in 1976, the journal was published, under copyright, by the American Meteorological Society. Between 1974–1975, the journal was published, without a copyright notice, and is still in the public domain under {{PD-US-no-notice}}.

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