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National Weather Service Raw Upper Air Observational Data - Individual Flights

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: April 12, 2026 at 09:19 PM | Dataset Last Updated: April 01, 2005 at 12:00 AM
These National Weather Service (NWS) raw upper air data contain individual flight data from sites monthly. Majority are Radiosonde Replacement System (RRS) sites, spanning about 7 to 72 degrees latitude and -171 to 172 degrees longitude. Data go back to 2005 to present operational flights and are packaged monthly. The RRS sites are currently the only ones generating individual flight data packages, each containing a "H" ASCII flight metadata file a "T" ASCII mandatory and significant levels observation file, and a "B" Binary Universal Form for the Representation of meteorological data (BUFR) encoded file of one-second resolution data. These raw observations are inputs to NWS Radiosonde Standard Levels data (DSI 6301), where the data are encoded at each site using the World Meteorological Organization Binary Universal Form for the Representation of meteorological data (BUFR) format, then packaged with briefer ASCII formatted flight data and transmitted to NCEI via a push to NCEI's FTP from individual sites.

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  • NCEI Dataset Landing Page

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  • NCEI Customer Engagement

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  • National Weather Service Raw Upper Air Observational Data (DSI 6214)

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  • Global Change Master Directory (GCMD) Keywords

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  • GCOS Essential Climate Variables

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  • NOAA National Centers for Environmental Information (NCEI)

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