In this example we are going to run wrf.exe again, but we are going to increase the frequency of certain output variables. This is called the 'Runtime I/O' option (which you can read more about here). There is no data pre-processing necessary. So as long as you still have wrfinput_d01 and wrfbdy_d01 files from a previous case, you can continue. If not, please return to the Single Domain case as generate these again.

 

 

 

Set-up WRF

• Make sure you are in the WRFV3 directory.    
   
   
• cd to directory test/em_real
   
   
• Edit the namelist.input file
  The namelist for the standard case is perfect for this example. You will just need to make a few changes (see below). To ensure that the model runs fast, make sure that max_dom=1.
  
  
  



• No need to run real.exe again, just run wrf.exe:
   
             wrf.exe
   
  If successful, in addition to your history and restart file, this will generate the following output file:
   
        auxhist24_d01_2012-01-27_00:00:00
        
   
  which will have the variables RAINC, RAINNC, T2, and Q2 at 30 minute intervals. You can view these variables by using 'ncview.'
  
  

 

Organization Suggestion:

Recall the suggestion (from the "basic" case) to create a directory to put your files in. Do this again for this case:

mkdir increase_freq_output

and then copy the necessary files into that directory to preserve them for potential later use.

You can now continue to run other practical examples.