PLEASE HELP! too much rain over slope terrain

Topics related to current and future physics in the WRF as well as any problems you may have.

PLEASE HELP! too much rain over slope terrain

Postby mino98 » Sat Oct 17, 2015 11:00 am

Hi, I have a problem with WRF-NMM: in daytime, unrealistic (not happening) rain is nearly always forecasted over certain zones, mostly over mountains.
Look at the bottom of these pictures, almost every day rain (even heavy!) is forecasted, but it does NOT fall though.
Image
Image

Resolution is 2km, and naturally no cumulus scheme is used!
Here is my namelist.input:
Code: Select all
&domains                 
time_step                = 5,
time_step_fract_num      = 0,
time_step_fract_den      = 10,
max_dom                  = 1,
e_we                     = 42,
e_sn                     = 66,
e_vert                   = 40,
num_metgrid_levels       = 27,
dx                       = 0.013,
dy                       = 0.013,
p_top_requested          = 1000,
ptsgm                    = 42000.,
grid_id                  = 1,
parent_id                = 1,
i_parent_start           = 1,
j_parent_start           = 1,
parent_grid_ratio        = 1,
parent_time_step_ratio   = 1,
/

&physics                 
mp_physics               = 5,
ra_lw_physics            = 99,
ra_sw_physics            = 99,
nrads                    = 360,
nradl                    = 360,
co2tf                    = 0,
sf_sfclay_physics        = 2,
sf_surface_physics       = 2,
bl_pbl_physics           = 2,
nphs                     = 12,
cu_physics               = 0,
ncnvc                    = 12,
tprec                    = 3,
theat                    = 3,
tclod                    = 3,
trdsw                    = 3,
trdlw                    = 3,
tsrfc                    = 3,
pcpflg                   = .false.,
isfflx                   = 0,
ifsnow                   = 0,
icloud                   = 0,
num_soil_layers          = 4,
mp_zero_out              = 0,
gwd_opt                  = 0,
/

&dynamics               
euler_adv                = .true.,
idtadt                   = 1,
idtadc                   = 1,
/


What could I try?
Thanks,
Giacomo
mino98
 
Posts: 7
Joined: Sat Jun 27, 2015 1:42 pm

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