WRF Downloads

You may download WRF modeling system source codes (including WRF model, WRF-Var (3DVAR), and WPS (WRF Preprocessing System), graphics software, terrestrial datasets for WPS, and test data for WRF model from this site.

WRF modeling system software Version 3.0 (April 4, 2008)

Release date: April 4, 2008 - This includes WRF model (detail), WRF-VAR and WPS (detail).

WRF modeling system software Version 2.2 (Dec 22, 2006)

Release date: December 22, 2006 - This includes WRF model (detail), and WPS (detail). WRF-Var (3DVAR) (detail).

For users who do not switch to the new WPS, SI has no change for this release.

External packages you may need to run WRF and graphics programs:

- netCDF for WRFSI and WRF model: http://www.unidata.ucar.edu/
- NCAR Graphics for NCL and RIP4: http://ngwww.ucar.edu/

Free input data for initializing WRF at NCAR:

NCAR's Scientific Computing Division's Data Support Section (DSS) is providing a number of datasets archived at NCAR for the latest year free and they can be otained online.

Real-time data from NCEP's ftp site:

NCEP provides a variety of regional (NAM) and global (GFS) data in GRIB format, and they can be used to initialize WRF in real-time. As of Feb 4 2008, all GFS and NAM data are in grib 2.

For NAM data, a popular dataset is the 40 km one, which has the following file names: nam.t{00,06,12,18}z.awip3dff.tm00.grib2, where ff stands for forecast hours. Forecast hours from 0 to 84 are available 4 times daily at 3 hourly interval.

For GFS data, a typical dataset is the 1 degree one, which has the following file names: gfs.t{00,06,12,18}.pgrbfhh.grib2 (where hh stands for forecast hour). Forecast hours from 0 to 384 are availably 4 times daily at 6 hour interval. For 0.5 degree data, try gfs.t{00,06,12,18}z.pgrb2fhh.