netCDF file Unrecognized

[drcjmelick]

Hi all,

I'm having problems with a netCDF file I'm trying to use in regrid_data_plane not being recognized. What is the excepted format for the header and data contents in the netCDF usage with MET? Thanks!

Chris

[rvalenzuelar]

I have an issue with a custom-made CF-compliance NetCDF file as well. I wonder if anyone here can share functional examples of NetCDF files to copy the structure. In my case is a GFS forecast file.

[j-opatz]

Hi Chris, and thank you for your question.

As you probably already read in the MET User's Guide, MET can handle "NetCDF files following the Climate and Forecast (CF) conventions, containing WRF output post-processed using wrf_interp, or produced by the MET tools themselves".
While I'm not sure that MET has example netCDF files, I do know that METplus has tarballs of data for each of its use cases by category, which includes netCDFs. Downloading one or more of those tarballs and reviewing the netCDFs would be a good start.
Additionally, MET is capable of reading in netCDFs via a Python script: take a look at this Python embedded script as an example. As you can see in the attrs dictionary, a certain amount of information needs to be available to MET for proper interpretation.
If after reviewing this material you're still having trouble with your netCDF file, you're welcome to perform a header dump of it here and we can take a look.

[drcjmelick]

I appreciate the detailed response and the options you gave me to determine what I need to add to the netCDF file to make it compliant with what MET expects. I will give it a try and respond if I still am having issues! Thanks, Chris From: j-opatz ***@***.***> Sent: Friday, September 3, 2021 8:55 AM To: dtcenter/METplus ***@***.***> Cc: MELICK, CHRISTOPHER J GS-12 USAF ACC 16 WS/WXD ***@***.***>; Author ***@***.***> Subject: [Non-DoD Source] Re: [dtcenter/METplus] netCDF file Unrecognized (#1137) Hi Chris, and thank you for your question. As you probably already read in the MET User's Guide<https://met.readthedocs.io/en/latest/Users_Guide/data_io.html#input-data-formats>, MET can handle "NetCDF files following the Climate and Forecast (CF) conventions, containing WRF output post-processed using wrf_interp, or produced by the MET tools themselves". While I'm not sure that MET has example netCDF files, I do know that METplus has tarballs<https://dtcenter.ucar.edu/dfiles/code/METplus/METplus_Data/v4.0/> of data for each of its use cases by category, which includes netCDFs. Downloading one or more of those tarballs and reviewing the netCDFs would be a good start. Additionally, MET is capable of reading in netCDFs via a Python script: take a look at this<https://metplus.readthedocs.io/en/latest/generated/model_applications/air_quality_and_comp/EnsembleStat_fcstICAP_obsMODIS_aod.html#python-embedding> Python embedded script as an example. As you can see in the attrs dictionary, a certain amount of information needs to be available to MET for proper interpretation. If after reviewing this material you're still having trouble with your netCDF file, you're welcome to perform a header dump of it here and we can take a look. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#1137 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AVOWTOZ7YXHEJGUOQAVIUM3UADHTRANCNFSM5DKAXPGQ>. Triage notifications on the go with GitHub Mobile for iOS<https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android<https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.