[Met_help] Re: [Fwd: sample of WRF variables' names]

John Halley Gotway johnhg at rap.ucar.edu
Fri Nov 14 16:17:14 MST 2008


I have good news and bad news for you.

The bad news is that MET doesn't read the NetCDF output from WRF directly.  Instead, users must first post-process their data using the WRF PostProcessor.
The good news is that the WRF PostProcessor writes it's output in GRIB format which MET reads.

In fact, we chose to support GRIB first for this very reason... to be compatible with the output of WPP.

And this isn't just a file format issue.  The output of the WRF model is on native model levels on a staggered horizontal grid.  We perform verification with MET on regular grids and on pressure
levels in the vertical.  WPP destaggers the grid and may be used to derive various fields of interest.

In order to use MET, you'll need to run the WRF output through WPP.

Information about WPP and the code itself may be retrieved from the WRF-NMM users webpage:

Even though it's listed on the WRF-NMM page, it may be run on ARW or NMM WRF output.


Ed Tollerud wrote:
> John,
> Isidora (see below), who creates our NeTCDF WRF model output files,
> tells me that we use the standard WRF NeTCDF output format. Attached is
> a listing (ncdump -h) for one of these files. To see if we have a
> compatibility problem before we proceed with downloads, is it possible
> for you to compare this output with something you have available for
> easy comparison (like the test case file you mention in your email)?
> Does this file provide enough information to see if it would be as-is
> compatible with MET without reformatting? If not, probably we would
> choose to add an extra reformat step rather than to add extra processing
> and extra GRIB files to the project (impossible at any rate). Thanks for
> your help on this long string of questions!
> Ed
> -------- Original Message --------
> Subject: 	sample of WRF variables' names
> Date: 	Fri, 14 Nov 2008 15:50:50 -0700
> From: 	Isidora Jankov <Isidora.Jankov at noaa.gov>
> To: 	Edward Tollerud <Edward.Tollerud at noaa.gov>
> Ed,
> This is the file containing a list of variables for our WRF model runs.
> Thanks
> Isidora

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