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<body class='hmmessage'><div dir='ltr'><div>Hi, I have a problem with WRF-NMM: in daytime, unrealistic (not happening) rain is nearly always forecasted over certain zones, mostly over mountains.</div><div>Look at the bottom of these pictures, almost every day rain (even heavy!) is forecasted, but it does NOT fall though.</div><div>http://www.meteoacquaviva.it/wrf/molise/Vento10m06_d01_GrADS_P.gif</div><div>http://www.meteoacquaviva.it/wrf/molise/Sfcmap06_d01_GrADS_P.gif</div><div><br></div><div>Resolution is 2km, and naturally no cumulus scheme is used!</div><div>Here is my namelist.input:</div><div>[code]&domains </div><div>time_step = 5,</div><div>time_step_fract_num = 0,</div><div>time_step_fract_den = 10,</div><div>max_dom = 1,</div><div>e_we = 42,</div><div>e_sn = 66,</div><div>e_vert = 40,</div><div>num_metgrid_levels = 27,</div><div>dx = 0.013,</div><div>dy = 0.013,</div><div>p_top_requested = 1000,</div><div>ptsgm = 42000.,</div><div>grid_id = 1,</div><div>parent_id = 1,</div><div>i_parent_start = 1,</div><div>j_parent_start = 1,</div><div>parent_grid_ratio = 1,</div><div>parent_time_step_ratio = 1,</div><div>/</div><div><br></div><div>&physics </div><div>mp_physics = 5,</div><div>ra_lw_physics = 99,</div><div>ra_sw_physics = 99,</div><div>nrads = 360,</div><div>nradl = 360,</div><div>co2tf = 0,</div><div>sf_sfclay_physics = 2,</div><div>sf_surface_physics = 2,</div><div>bl_pbl_physics = 2,</div><div>nphs = 12,</div><div>cu_physics = 0,</div><div>ncnvc = 12,</div><div>tprec = 3,</div><div>theat = 3,</div><div>tclod = 3,</div><div>trdsw = 3,</div><div>trdlw = 3,</div><div>tsrfc = 3,</div><div>pcpflg = .false.,</div><div>isfflx = 0,</div><div>ifsnow = 0,</div><div>icloud = 0,</div><div>num_soil_layers = 4,</div><div>mp_zero_out = 0,</div><div>gwd_opt = 0,</div><div>/</div><div><br></div><div>&dynamics </div><div>euler_adv = .true.,</div><div>idtadt = 1,</div><div>idtadc = 1,</div><div>/</div><div>[/code]</div><div><br></div><div>What could I try?</div><div>Thanks,</div><div>Giacomo</div> </div></body>
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