I am running some test forecasts using WRF 3.6.1. and am having some problems with my grids. Specifically, I am specifying a parent and nest domain each with 25 points for longitude and latitude (so that there is a point right at the middle of the inner domain and the parent grid points are coincident with inner grid points with a 3:1 nesting ratio).
I would expect an output of 25 by 25 points for each domain. however, I am only getting 24 by 24 points as output. In fact if I look at the geom_em or met_em netcdf files generated by WPS I already get only grids with 24 by 24 points.
What's going on?
Here is the geogrid section of my namelist.wps file:
&geogrid parent_id = 1, 1, parent_grid_ratio = 1, 3, i_parent_start = 1, 9, j_parent_start = 1, 9, s_we = 1, 1, e_we = 25, 25, s_sn = 1, 1, e_sn = 25, 25, geog_data_res = '10m','2m', dx = 18000, dy = 18000, map_proj = 'lambert', ref_lat = 53.526, ref_lon = -113.529, truelat1 = 53.526, truelat2 = 53.526, stand_lon = -113.529, geog_data_path = '/media/data/WRF3.6.1/data/geog/' /