Nested Runs - Ndown (real.exe)

Run real.exe for both domains: STEP 2

The purpose of this step is to ingest higher resolution terrestrial fields and corresponding land-water masked soil fields.

1. Ensure you are in the WRF/ directory.
    For this case we are going to run in the test/em_real/ directory.

cd test/em_real

2. Link in the met_em files created with metgrid.exe

ln -sf ../../../WPS/met_em.d0* .

3. Edit namelist.input
    Add the changes below to the namelist.input file.
   Note 1 : For an explanation of these variables see Chapter 5 of the User's Guide, or the Best Practices WRF Namelist.

run_days = 0, 0,
run_hours = 48, 48,
run_minutes = 0, 0,
run_seconds = 0, 0,
start_year = 2016, 2005,
start_month = 10, 08,
start_day = 06, 28,
start_hour = 00, 00,
end_year = 2016, 2016,
end_month = 10, 10,
end_day = 08, 08,
end_hour = 00, 00,
interval_seconds = 21600
input_from_file = .true.,.true.
history_interval = 120, 120,
frames_per_outfile = 1000, 1000,
restart = .false.,
time_step = 150,
max_dom = 2,
i_parent_start = 1, 23,
j_parent_start = 1, 46,
e_we = 91, 88,
e_sn = 100, 79,
e_vert = 35, 35,
num_metgrid_levels = 32
dx = 27000, 9000,
dy = 27000, 9000,

4. Run real.exe (verify that the program ran correctly)

       Check that the following three files have been created

wrfinput_d01
wrfinput_d02
wrfbdy_d01

    What is contained in these files?
 

5. Rename the 'wrfinput_d02' file to 'wrfndi_d02.'

Continue to steps 3 & 4