Weather Research and Forecasting (WRF) model is a well-known atmospheric modeling system developed by NCAR. It is suitable for both meteorological research and operational weather prediction.
Official website: https://www2.mmm.ucar.edu/wrf/users/
Updated: Aug 2023Mar 2024
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Module name | Description | Note |
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WRF/4.4.2-DMSM-cpeCray-23.03 | Standard WRF model | Aggressive optimization |
WRFchem/4.5.1-DM-cpeIntel-23.09 | WRF model with chemistry, | Standard optimization |
WRFchem/4.5.2-DM-cpeCray-23.03 | WRF model with chemistry, | (Experimental) |
WPS/4.4-DM-cpeCray-23.03 | WRF pre-processing system | for WRF 4.4.X |
WPS/4.5-DM-cpeIntel-23.09 | WRF pre-processing system | for WRF 4.5.X |
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DM indicates that the module only supports MPI (Slurm’s task); therefore, DMSM indicates that the module supports both MPI and OpenMP. Users can set the number of OpenMP thread per MPI process through For WRF on LANTA, we recommend setting |
1. Input file
1.1 To run the WRF model, time-dependent meteorological data (global model output/background state) is required. It can be downloaded from, for example, WRF - Free Data and NCEP GFS / GDAS.
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1.3 To run the WRF model, the namelist.input is required. A concise description of the essential parameters can be found here, while the full description is available in chapter 5 of the WRF user's guide.
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Two complete examples are available at
then follow the instructions inside the README file. (The |
2. Job submission script
Below is an example of a WRF submission script (submitWRF.sh). It can be created using vi submitWRF.sh.
To ensure whole node allocation, please verify that 128 = (Number of MPI processes per node) x (Number of OpenMP threads per MPI processes) – this is recommended to avoid potential issues.
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#!/bin/bash
#SBATCH -p compute # Partition
#SBATCH -N 1 # Number of nodes
#SBATCH --ntasks-per-node=32 # Number of MPI processes per node
#SBATCH --cpus-per-task=4 # Number of OpenMP threads per MPI process
#SBATCH -t 5-00:00:00 # Job runtime limit
#SBATCH -J WRF # Job name
#SBATCH -A ltxxxxxx # Account *** {USER EDIT} ***
module purge
module load WPS/4.4-DM-cpeCray-23.03
module load WRF/4.4.2-DMSM-cpeCray-23.03
export OMP_STACKSIZE="32M"
export OMP_NUM_THREADS=${SLURM_CPUS_PER_TASK}
ulimit -s unlimited
# *** {USER EDIT} *** #
# Please check that namelist.wps and namelist.input areexist inwhere this script sameis directorysubmitted.
link_grib /--Path-to-your-meteorological-data--/
link_vtable /--Name-of-Vtable-to-parse-the-above-met-data--/
# -- WPS -- #
link_wps
srun -n${SLURM_NTASKS} ./geogrid.exe
srun -N1 -n1 ./ungrib.exe
srun -n${SLURM_NTASKS} ./metgrid.exe
unlink_wps
# -- WRF -- #
link_emreal
srun -n${SLURM_NTASKS} ./real.exe
srun -n${SLURM_NTASKS} -c${SLURM_CPUS_PER_TASK} ./wrf.exe
unlink_emreal |
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module help WRF. |
| Note |
Some options do not support hybrid run (such as running WRF-Chem). If this is the case, do the following:
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Some physics/dynamics options (and WRF-Chem) DO NOT support hybrid (DM+SM) run. If it is stuck at the beginning. try the following:
Use
#SBATCH --cpus-per-task=1andexport OMP_NUM_THREADS=1,
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Increase the total number of tasks, for example,
#SBATCH --ntasks-per-node=128
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Specify the number of tasks for each executable explicitly; for instance, use
srun -n16 ./real.exesrun -n128
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./wrf.exeor justsrun ./wrf.exe
3. Job submission
To submit jobs to the SLURM queuing system on LANTA, execute
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sbatch submitWRF.sh |
Two complete examples are available at /project/common/WRF/. To run it within a directory, use cp /project/common/WRF/Example1/* . or cp /project/common/WRF/Example2/* . and follow the instructions in the README file.
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Users should check the |
4. Post-processing
NCL, NCO, CDO, Ncview, ecCodes, netcdf4-python, Ncview, wrf-python, pyngl, pynio, and cartopy are available for processing NetCDF files. They are installed in Conda environment the netcdf-py39 of Miniconda3Mamba/2223.11.1-10-0 (previously Miniconda3).
To use NCL, for instance,
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module load Miniconda3Mamba/2223.11.10-10 conda activate netcdf-py39 # For NCL only export NCARG_ROOT=${CONDA_PREFIX} export NCARG_RANGS=/project/common/WPS_Static/rangs export NCARG_SHAPEFILE=/project/common/WPS_Static/shapefile # (If used) # Commands such as 'ncl xxx' or 'python xxx' for serial run |
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Please abstain from doing heavy post-processing tasks on LANTA frontend/login nodes. |
5. Advanced topics
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Install your own WRF-Chem preprocessing tools
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| Child pages (Children Display) |
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