Below you'll find Jiwan's instructions for running/compiling WRF on Janus 

Original author: Timothy Dwight Dunn(timothy.dunn@colorado.edu)
File created by: Jiwan Kumar Rana(jiwan.rana@colorado.edu)
Date created   : June 28, 2013

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NOTE: THESE INSTRUCTIONS ARE FOR WRF 3.5 AND WPS 3.5


// HOW TO COMPILE AND RUN WRF ON JANUS//

1. Copy the contents of the file "dot_my.bash_profile" to your
      ".my.bash_profile" file. 
      If using a bash shell, copy the commands as it is.
      If using a differnt shell, export -> setenv 
         Example: export MPI_CC=icc (bash)
       setenv MPI_CC icc (csh)  

2. Download, unzip and untar WRF source files on Janus.
      If need to copy the files from local computer to Janus, use either
        SFTP or SCP or anyother commands.
      Unzip and untar using :
            gunzip <filename.tar.gz> 
            tar -xvf <filename.tar>

3. Goto WRF3 directory and run the following commands:
       1. ./clean -a
       2. ./configure
       3. Choose Linux_x86_64 i486 i586 i686 ifort compiler with icc(dmpar)
       { Most likely Option # 19}
       4. Compile for nesting? Choose 1 =basic
       5. ./compile -j 12 em_real >& compile.log     
       6. View compile.log for any errors

4. Goto WPS directory and run the following commands:
       1. ./configure
       2. Choose Linux x86_64, Intel compiler (dmpar_NO_GRIB2)
       { Most likely Option # 20 }
       3. ./compile >& compile.log
       4. View compile.log for any errors   

5. Congratulations ! You have sucessfully compiled WRF on Janus.