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Due to scheduled maintenance, many NCEI systems will be unavailable on Saturday, August 24 from 11:30 AM ET to 1:30 PM ET. We apologize for any inconvenience.


The following categories of documentation can help you find out more information about the NOAA National Operational Model Archive and Distribution System (NOMADS).

  • User Guide
    The NOMADS User Guide provides an overview of using NOMADS to access data. The guide introduces the use of distributed data access, explains general data structure, shows how to retrieve data, and presents examples of advanced data access methods (such as subsetting, scripting, and using various tools).
  • THREDDS Enhanced Access
    This document describes how to use advanced access features of THREDDS such as web maps, and custom NetCDF downloads. 
  • ERDDAP Instructions
    This document describes the basics of using ERDDAP with model data. It includes step-by-step examples using NCEI data.
  • Frequently Asked Questions (FAQ)
    The FAQ lists commonly asked, NOMADS-related questions from the user community along with answers.
  • NOMADS Briefings and Workshops
    Download options for several NOMADS presentations are available.
  • NOMADS Publications
    Access to NOMADS-related publications available to view or download.