WRF 2016 Major Release

WRF Release Information

The latest major WRF release is Version 3.7 (April 2015), and the latest minor release is Version 3.7.1 (August 2015). Details on these may be found on the WRF download information pages: WRF V3.7 and WRF V3.7.1.

The next major WRF release will be WRF Version 3.8 in Spring 2016. The timeline for it is given below. A sampling of potential features is listed, but ultimate inclusion of any candidate is not guaranteed in advance and is dependent on timely preparation, testing, and acceptance of the related code.

  • Software: PIO build updates, Hybrid parallelism
  • Physics: Deng shallow Cu scheme, Goddard radiation scheme updates, Wave roughness length scheme, Aerosol radiation interaction
  • WRFDA: AMSR-2 obs, GPSRO non-local operator, Dynamic constraint for hybrid DA
  • WRF-Chem: Dust scheme improvements
  • WRF-Hydro: Updated code
  • HWRF: 2015 operational changes, Grell-Freitas cumulus scheme
  • WPS and Real: SRTM topo dataset, Modified base state, Vertical nesting improvements

Developers seeking to propose code for new or improved capabilities for the WRF system 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 contributions and manages the repository) or the Release Committee (which oversees major releases). 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 the physics review procedures (where applicable), meeting the testing and documentation requirements, and meeting the release schedule. Developers should familiarize themselves with Information for Code Contributors. Developers and contributors may contact wrfhelp@ucar.edu for information on how to prepare and provide their code to the Developers' Committee.

Timeline— 2016 WRF Major Release

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

Early September 2015

6-Month advance date

  • RC begins meetings for major release cycle.
  • WRF users notified of release and reminded of where to find requirements and procedures for code submission.

October—December 2015

Code accepted and admitted to the repository before or during this time may be included in release. Code submissions made before or during this period have to undergo all testing and acceptance, and may or may not ultimatley be accepted in time for the release branch cutoff and the release. However, submission after this period will definitely not be eligible for the release.

January 4, 2016

Release branch cutoff

  • Cutoff of repository branch that will become the basis of the release.
  • Only bugfixes for code in the branch permitted after this.
  • WRF repository remains open for code addtitions, which will in line for the subsequent releases.
  • First friendly-user release soon after branch cutoff— preliminary code made available for testing.

Mid-February 2016

  • Second friendly-user release— updated preliminary 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—Early April 2016

  • DC certifies code (final approval) for release. Code packaged and staged for release.
  • 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
Laurie Carson, DTC
Jimy Dudhia, NCAR/MMM
Dave Gill, NCAR/MMM
Michael Kavulich, NCAR/MMM
Steven Peckham, NOAA/ESRL
Wei Wang, NCAR/MMM