WRF 2014 Major Release

WRF Release Information

The most recent major WRF release is Version 3.7 (April 2015). While the details on this may be found at: WRF Downloads and Information, new features and capabilites include the following.

  • Software: Memory use reduction, Parallel I/O, CF compliance
  • Physics: New Tiedke cumulus parameterization, New Shin-Hong PBL scheme, Multi-scale Kain-Fritsch cumulus scheme, Revised MM5 surface layer scheme, Enhanced urban canopy model, Updated Noah-MP and RUC LSMs
  • WRFDA: New background error option, New BE generation code version, New physics options for 4DVAR, Addition of data types
  • WRF-Chem: CB5 mechanism, Aqueous chem updates
  • WRF-Hydro: Version 3.0

Developers seeking to have their codes for new or improved capabilities for the WRF system considered for a release must review Information for Code Contributors. Prospective contributors may write to wrfhelp@ucar.edu for information and for contacting the Developers' Committee (which oversees WRF code contributions and manages the repository) or the Release Committee (which oversees the major release process). Both the Developers' Committee and the Release Committee are described in WRF Code Repository and Release Administration.

The consideration of any code for inclusion in the WRF repository or a release depends on the developer's following all commit request documentation and testing requirements and meeting the release schedule deadlines. Developers may have code considered for a release as long as both the procedures for code contribution and the timelines for the release are met, and they should familiarize themselves with Information for Code Contributors. Developers and contributors may contact wrfhelp@ucar.edu for information on providing their code to a member of the Developers' Committee and on preparing and testing it prior to offering it.


Timeline— 2016 WRF Major Release

The timeline for the next major WRF release, projected for Spring 2016, is currently as follows. "RC" refers to the Release Committee; "DC" refers to the Developers' Committee. "R" refers to the target release date.

Early September 2015

Approx. 6-mo advance date (R-6m)

  • RC begins meetings for major release cycle.
  • WRF users notified of release and provided information on dates and where to find requirements and procedures.

September 30, 2015

  • Notices of intent to submit code are due from potential contributors.

October 31, 2015

Approx. 4-mo advance date (R-4m)

  • New code or modifications from outside contributors must be provided to the RC point of contact or the DC. Code must have been run through the required testing.

December 1, 2015

Approx. 3-mo advance date (R-3m)

  • Release branch cutoff date or repository freeze (if no release branch) (bugfixes excepted).
  • Check on new features for the release is discussed by the RC and DC.

Mid-Late January 2016

  • 1st friendly-user release. Preliminary release code made available for testing.

Mid-February 2016

  • 2nd friendly-user release. Updated preliminary release code made available for testing.
  • Remaining bug fixes implemented.
  • Full set of regression tests run on machines at NCAR.
  • Weekly RC meetings.

Early March 2016

  • Final round of large testing. RC and DC meetings focus on status of code and testing.

Late March to Early April 2016

  • DC certifies code (final approval) for release. Code packaged and staged for release.

April 2016

  • Release.


  • Release Committee

    The WRF Release Committee oversees the major releases of WRF. It is described in the policies for NCAR's administration of the WRF code in WRF Code Repository and Release Administration. The members are listed below.

    Jordan Powers, NCAR/MMM— Chairman
    Michael Barlage, NCAR/RAL
    Mrinal Biswas, DTC
    Tom Black, NOAA/NCEP
    Jimy Dudhia, NCAR/MMM
    Dave Gill, NCAR/MMM
    Georg Grell, NOAA/ESRL
    Michael Kavulich, NCAR/MMM
    Steven Peckham, NOAA/ESRL
    Wei Wang, NCAR/MMM
    Jamie Wolff, DTC
    Wei Yu, NCAR/RAL