[Wrf-users] configure WRF with LAT-LON projection (Feng Liu)

[Steve]

A couple of points...

*  You may want to check with the developer of the WRF-EMS system to see 
if global lat-lon grids are well supported by his special version of the 
Domain Wizard.

*  Note that wrfpost (at least the version that comes with NCAR wrf 
3.1.x distribution) --does not-- properly handle the lat-lon grids.  I 
have confirmed this with several e-mails with wrfhelp.  Grib files can 
be created but they have invalid grid projection information.   I don't 
know if the other post-processing utilities handle this grid.  You will 
probably need to view the data using the WRF netCDF files.  I'm pretty 
sure the NCAR Graphics/NCL scripts can properly display lat-lon grids 
from the netCDF files.

Stephen Masters  masters.steve at ensco.com
ENSCO, Inc.
Melbourne, FL



wrf-users-request at ucar.edu wrote:

> 
> Today's Topics:
> 
>    1. Re: configure WRF with LAT-LON projection (Feng Liu)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 19 Apr 2010 10:49:49 -0700
> From: "Feng Liu" <fliu at mag.maricopa.gov>
> Subject: Re: [Wrf-users] configure WRF with LAT-LON projection
> To: "Luis Del Castillo" <luis.delcastillo at cathalac.org>,
> 	<wrf-users at ucar.edu>
> Message-ID:
> 	<A01A26511CAA69409D6D8095B3E104BD02BFB70B at MAIL.mag.maricopa.gov>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> Please check your domains attached, is that correct? If yes, you should check if you processed input grib data correctly. 
> 
> Feng
> 
>  
> 
>  
> 
> From: Luis Del Castillo [mailto:luis.delcastillo at cathalac.org] 
> Sent: Monday, April 19, 2010 8:43 AM
> To: Feng Liu; wrf-users at ucar.edu
> Subject: RE: [Wrf-users] configure WRF with LAT-LON projection
> 
>  
> 
> Hi 
> 
>  
> 
> I did it but i got an error when is running metgrid and says :
> 
> Missing values encountered in interpolated fields.
> 
> Check to make sure the areal coverage of your domain lies entirely within the initialization data set.
> 
> FYI am using WRF-EMS
> 
> Luis
> 
>  
> 
> From: Feng Liu [mailto:fliu at mag.maricopa.gov] 
> Sent: Viernes, 16 de Abril de 2010 06:02 p.m.
> To: Luis Del Castillo; wrf-users at ucar.edu
> Subject: RE: [Wrf-users] configure WRF with LAT-LON projection
> 
>  
> 
> Hi,
> 
> Remove dx and dy settings for making global run. The program geogrid.exe will calculate grid distance according to your e_we and e_sn settings.
> 
> Feng
> 
>  
> 
>  
> 
> From: wrf-users-bounces at ucar.edu [mailto:wrf-users-bounces at ucar.edu] On Behalf Of Luis Del Castillo
> Sent: Friday, April 16, 2010 9:33 AM
> To: wrf-users at ucar.edu
> Subject: [Wrf-users] configure WRF with LAT-LON projection
> 
>  
> 
> Somebody knows how to configure the model with lat-lon projection.
> 
>  
> 
> This is my basic configuration but with this I got issues:
> 
>  
> 
> &geogrid
> 
>  parent_id                  = 1, 1
> 
>  parent_grid_ratio          = 1, 3
> 
>  i_parent_start             = 1, 6
> 
>  j_parent_start             = 1, 6
> 
>  e_we                       = 155, 202
> 
>  e_sn                       = 86, 184
> 
>  geog_data_res              = '10m', '5m'
> 
>  dx                         = 0.225
> 
>  dy                         = 0.225
> 
>  map_proj                   = 'lat-lon'
> 
>  ref_lat                    = 14.052
> 
>  ref_lon                    = -75.744
> 
>  truelat1                   = 14.052
> 
>  truelat2                   = 0
> 
>  stand_lon                  = -75.744
> 
>  ref_x                      = 77.5
> 
>  ref_y                      = 43
> 
>  geog_data_path             = '/home/wrf/wrfems/data/geog'
> 
>  opt_geogrid_tbl_path       = '/home/wrf/wrfems/runs/MesoAmerica/static'
> 
> /
> 
>  
> 
>  
> 
> Luis Alejandro Del Castillo R.
> IT Support / Soporte TIC
> CATHALAC
> Luis Tel: 507++317-3235 - CATHALAC Tel: 507++317-3200 - Fax: 507++317-3299
> 111 Ciudad del Saber, Clayton, Panam?
> Apartado 0843-03102, Panam?
> luis.delcastillo at cathalac.org - www.cathalac.org <http://www.cathalac.org/> 
> 
>  
> 
>  
> 
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