WRF ARW User's Guide - MMM - UCAR

POST-PROCESSING
unstagDim: Dimension to unstagger. Must be either "X", "Y", or "Z". This is case
sensitive. If not one of these strings, the returning array will be unchanged.
wrf_wps_dom (wks, mpres, lnres, txres)
A function has been built into NCL to preview where a potential domain will be placed
(similar to plotgrids.exe from WPS).
This functionality is available in NCL version 5.1.0, but is currently still experimental.
The lnres and txres resources are standard NCL Line and Text resources. These are used
to add nests to the preview.
The mpres are used for standard map background resources like:
mpres@mpFillOn ; mpres@mpFillColors ; mpres@mpGeophysicalLineColor ;
mpres@mpNationalLineColor ; mpres@mpUSStateLineColor ;
mpres@mpGridLineColor ; mpres@mpLimbLineColor ;
mpres@mpPerimLineColor
But its main function is to set map resources to preview a domain. These resources are
similar to the resources set in WPS. Below is an example to display 3 nested domains on
a Lambert projection. (The output is shown below).
mpres@max_dom = 3
mpres@parent_id = (/ 1, 1, 2 /)
mpres@parent_grid_ratio = (/ 1, 3, 3 /)
mpres@i_parent_start = (/ 1, 31, 15 /)
mpres@j_parent_start = (/ 1, 17, 20 /)
mpres@e_we = (/ 74, 112, 133/)
mpres@e_sn = (/ 61, 97, 133 /)
mpres@dx = 30000.
mpres@dy = 30000.
mpres@map_proj = "lambert"
mpres@ref_lat = 34.83
mpres@ref_lon = -81.03
mpres@truelat1 = 30.0
mpres@truelat2 = 60.0
mpres@stand_lon = -98.0
WRF-ARW V3: User’s Guide 9-14