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WRF Data Assimilation System Users Page

Welcome to the page for users of the Weather Research and Forecasting (WRF) model data assimilation system (WRFDA). The WRFDA system is in the public domain and is freely available for community use. It is designed to be a flexible, state-of-the-art atmospheric data assimilation system that is portable and efficient on available parallel computing platforms. WRFDA is suitable for use in a broad range of applications, across scales ranging from kilometers for regional and mesoscale modeling to thousands of kilometers for global scale modeling.

The Mesoscale and Microscale Meteorology (MMM) Laboratory of NCAR currently maintains and supports a subset of the overall WRF code (Version 3) that includes:

- WRF Software Framework (WSF)
- Advanced Research WRF (ARW) dynamic solver, including one-way, two-way nesting and moving nests, grid and observation nudging
- WRF Pre-Processing System (WPS)
- WRF Data Assimilation System (WRFDA) (found on this site)
- Numerous physics packages contributed by WRF partners and the research community

Other components of the WRF system will be supported for community use in the future, depending on interest and available resources.

Quick links:

  • Download WRFDA Latest version: 3.8.1 (Released August 12, 2016)
  • WRFDA system requirements Lists the requirements to run WRFDA on your system
  • WRFDA Users' Guide Instructions on installing and running the latest version of WRFDA
  • Free Input Data Free-to-download datasets to use with WRFDA
  • WRFDA code browser View a browser-friendly version of the WRFDA source code
  • WRF Users Page WRF Model source code, User Guide, and Online Tutorial
  • Get help for WRFDA through the wrfhelp email service

  • Locations of Site Visitors


    Latest WRFDA Release

    WRFDA Version 3.8.1
         (Released August 12, 2016)

    WRF / WRFDA realtime forecast

    WRF/WRFDA forecast
    Click here for latest 48-hr forecast

    What's new

    August 12, 2016

    July 18, 2016

    An online WRFDA code browser is now available!

    June 22, 2016

    The Free Data page has been updated with information on how to download AMSR2 data.

    May 15, 2016

    The Known Problems page has been updated with bug fixes for compilation on some systems, as well as a 4DVAR run-time issue.


    Archived news and announcements