[ncl-talk] using ncl/esmf to regrid non-standard WRFOUT files

[Bill Ladwig]

Hi Kelly,

Full disclaimer, I'm not a regridding expert, but I'm pretty sure that the
curvilinear_to_SCRIP function wants latitude and longitude coordinates for
your grid points, and I think this might be where things are going wrong.
Your GLAT and GLON variables are in radians. Try converting the radians to
degrees and see if that works, since I don't see that conversion happening
in your script.

Hope this helps,

Bill


On Mon, Apr 1, 2019 at 12:14 PM Kelly Mahoney - NOAA Federal <
kelly.mahoney at noaa.gov> wrote:

> Hello,
>
> We are stuck with a problem trying to use existing ncl code (using esmf
> regridding) for wrf output that is missing some critical information, and
> I'm hoping someone might have advice on the best/quickest workaround:
>
> The data in question are produced from an older version of WRF-NMM, and
> are evidently missing coordinate attributes and perhaps also the vertical
> coordinate. [Although - in the end we actually only need 2D/surface data so
> perhaps the vertical coordinate issue won't be a show-stopper?]
>
> A sample of the wrfout in question can be found here:
>
> ftp://ftp.cdc.noaa.gov/pub/Public/kmahoney/NWM_PR/wrfout_d01_2019-03-15_18-00-00.nc
>
> and the sample codes that we're ultimately trying to use are here:
>
> ftp://ftp.cdc.noaa.gov/pub/Public/kmahoney/NWM_PR/HRRR2WRFHydro_generate_weights.ncl
> (this is Step 1 to generate the weights needed...this runs without stated
> errors but ultimately doesn't actually generate the weights needed by Step
> 2, which is here:
> ftp://ftp.cdc.noaa.gov/pub/Public/kmahoney/NWM_PR/HRRR2WRFHydro_regrid.ncl
> )
>
> I am far out of my comfort zone in the details of netcdf files and all the
> various tools (nco? ncl? ncml?) to potentially manipulate them into
> something recognizable by standard ncl/esmf functions.
>
> Thanks in advance for any experience or advice someone might be able to
> offer!
>
> Kelly Mahoney
>
>
>
>
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