NCEP ADP ETA / NAM Upper Air Observation Subsets

NCEP ADP ETA / NAM Upper Air Observation Subsets are composed of a regional synoptic set of upper air reports centered over North America, operationally collected by the National Centers for Environmental Prediction (NCEP). These include radiosondes, pibals and aircraft reports from the Global Telecommunications System (GTS) and satellite data from the National Environmental Satellite Data and Information Service (NESDIS). The reports can include pressure, geopotential height, temperature, dew point depression, wind direction and speed. Data may be available at up to 20 mandatory levels from 1000 millibars to 1 millibar, plus a few significant levels. Report time intervals range from 3 hourly to 12 hourly. These data are the primary input to the EDAS / NAM Data Assimilation System (NDAS starting January 23, 2005). DS351.0 [https://rda.ucar.edu/datasets/ds351.0/] provides global data coverage over the same time period.

This data set is no longer updated.

If you have a need for North American data that is not met by DS351.0 NCEP ADP Global Upper Air Observational Weather Data, October 1999 - continuing [https://rda.ucar.edu/datasets/ds351.0/], contact the RDA for alternatives.

To Access Resource:

Questions? Email Resource Support Contact:

  • Thomas Cram
    tcram@ucar.edu
    NSF NCAR - Geoscience Data Exchange

Temporal Range

  • Begin:  2000-10-23
    End:  2017-03-19

Keywords

Resource Type dataset
Temporal Range Begin 2000-10-23
Temporal Range End 2017-03-19
Temporal Resolution N/A
Bounding Box North Lat 90
Bounding Box South Lat -90
Bounding Box West Long -180
Bounding Box East Long 180
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : NCEP BUFRLIB software

Related Resource #2 : NCEP BUFRLIB MNEMONICS

Related Resource #3 : Description of Data Processing at NCEP
Additional Information N/A
Resource Format WMO_BUFR
Standardized Resource Format BUFR
Asset Size 231340 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name Thomas Cram
Resource Support Email tcram@ucar.edu
Resource Support Organization NSF NCAR - Geoscience Data Exchange
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author Satellite Services Division, Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce
National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Publisher NSF National Center for Atmospheric Research
Publication Date 2004-11-03
Digital Object Identifier (DOI) https://doi.org/10.5065/4F6T-NT78
Alternate Identifier d351001
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-03T00:31:27Z
Metadata Record Identifier edu.ucar.gdex::d351001
Metadata Language eng; USA
Suggested Citation Satellite Services Division, Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce. (2004). NCEP ADP ETA / NAM Upper Air Observation Subsets. NSF National Center for Atmospheric Research. https://doi.org/10.5065/4F6T-NT78. Accessed 04 October 2025.

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