Forecasting using WRF ARW

Any WPS problems/questions that might not fall into the other topics in this category

Forecasting using WRF ARW

Postby Raja.asim » Wed Aug 07, 2019 3:25 am

Hello Everyone!
I have been using working for WRF ARW for about 2 months for analyses purposes but now I want to use WRF ARW for forecasting purposes for the next 48 hours. I have download grib file from https://rda.ucar.edu/datasets/ds083.3/i ... 3?g=201701
Currently, I have run the simulation as an analysis( Start and ending time in namelist.wps and namelist.input is the same of grib files I have downloaded) because I did not know how to change my namelist.wps , namelist.input , boundary conditions, physics scheme, and do the post-processing for the Forecasting case. I have some questions
1)How to change my namelist.wps and namelist.input?
2)How to do Post-processing to wrf out files?
3) Currently, my grib files are from 2017-01-01_00:00:00 to 2017-01-03_00:00:00 but I want to do forecast of 2017-01-04 how will achieve that?
Thanks in advance
Raja Asim
P.S below is my namelist.wps and namelist.input files
Namelist.wps
&share
wrf_core = 'ARW',
max_dom = 4,
start_date = '2017-01-01_03:00:00', '2017-01-01_03:00:00','2017-01-01_03:00:00','2017-01-01_03:00:00',
end_date = '2017-01-02_21:00:00', '2017-01-01_03:00:00', 2017-01-01_03:00:00','2017-01-01_03:00:00',
interval_seconds = 21600,
io_form_geogrid = 2,
debug_level = 0,
/

&geogrid
parent_id = 1, 1, 2, 3,
parent_grid_ratio = 1, 3, 3, 3,
i_parent_start = 1, 25, 46, 48,
j_parent_start = 1, 25, 44, 57,
e_we = 100, 151, 184, 205, 181,
e_sn = 100, 151, 184, 205, 181,
geog_data_res = 'default','default','default','default',
dx = 9000,
dy = 9000,
map_proj = 'lambert',
ref_lat = 25.08,
ref_lon = 67.97,
truelat1 = 25.08,
truelat2 = 25.08,
stand_lon = 67.97,
geog_data_path = '/home/raja/Build_WRF/WPS_GEOG',


/

&ungrib
out_format = 'WPS',
prefix = 'FILE',
/

&metgrid
fg_name = 'FILE',
io_form_metgrid = 2,

/



Namelist.input
&time_control
run_days = 0,
run_hours = 48,
run_minutes = 0,
run_seconds = 0,
start_year = 2017, 2017, 2017, 2017, 2017,
start_month = 01, 01, 01, 01, 01,
start_day = 01, 01, 01, 01, 01,
start_hour = 03, 03, 03, 03,
start_minute = 00, 00, 00, 00,
start_second = 00, 00, 00, 00,
end_year = 2017, 2017, 2017, 2017, 2010,
end_month = 01, 01, 01, 01, 01,
end_day = 02, 02, 02, 02, 02,
end_hour = 21, 21, 21, 21,
end_minute = 00, 00, 00, 00,
end_second = 00, 00, 00, 00,
interval_seconds = 21600
input_from_file = .true.,.true.,.true.,.true., .true.,
history_interval = 120, 60, 60, 60, 60
frames_per_outfile = 1000, 1000, 1000, 1000, 1000,
restart = .false.,
restart_interval = 5000,
io_form_history = 2
io_form_restart = 2
io_form_input = 2
io_form_boundary = 2
debug_level = 0
/

&domains
time_step = 54,
time_step_fract_num = 0,
time_step_fract_den = 1,
max_dom = 4,
e_we = 100, 151, 184, 205, 181,
e_sn = 100, 151, 184, 205, 181,
e_vert = 40, 40, 40, 40, 33,
p_top_requested = 5000,
num_metgrid_levels = 32,
num_metgrid_soil_levels = 4,
dx = 9000, 3000, 1000, 333.333344, 185.185,
dy = 9000, 3000, 1000, 333.333344, 185.185,
grid_id = 1, 2, 3, 4, 5,
parent_id = 1, 1, 2, 3, 4,
i_parent_start = 1, 25, 46, 48, 55,
j_parent_start = 1, 25, 44, 57, 65,
parent_grid_ratio = 1, 3, 3, 3, 3,
parent_time_step_ratio = 1, 3, 3, 3, 3,
feedback = 1,
smooth_option = 0
/

&physics
physics_suite = 'CONUS'
radt = 30, 30, 30, 30, 30,
bldt = 0, 0, 0, 0, 0,
cudt = 5, 5, 5, 5, 5,
icloud = 1,
num_soil_layers = 4,
num_land_cat = 21,
sf_urban_physics = 0, 0, 0, 0, 0,
/

&fdda
/

&dynamics
w_damping = 0,
diff_opt = 1, 1, 1, 1, 1,
km_opt = 4, 4, 4, 4, 4,
diff_6th_opt = 0, 0, 0, 0, 0,
diff_6th_factor = 0.12, 0.12, 0.12, 0.12, 0.12,
base_temp = 290.
damp_opt = 0,
zdamp = 5000., 5000., 5000., 5000., 5000.,
dampcoef = 0.2, 0.2, 0.2 0.2, 0.2,
khdif = 0, 0, 0, 0, 0,
kvdif = 0, 0, 0, 0, 0,
non_hydrostatic = .true., .true., .true.,.true., .true.,
moist_adv_opt = 1, 1, 1, 1, 1,
scalar_adv_opt = 1, 1, 1, 1, 1,
gwd_opt = 0,
/

&bdy_control
spec_bdy_width = 5,
spec_zone = 1,
relax_zone = 4,
specified = .true., .false.,.false., .false.,.false.,
nested = .false., .true., .true., .true., .true.,
/

&grib2
/

&namelist_quilt
nio_tasks_per_group = 0,
nio_groups = 1,
/
Raja.asim
 
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Joined: Mon Aug 05, 2019 6:52 am

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