Working with Canadian Grib2 data

[Mabus00]

I'm a serious newby but no matter what I do cfgrib doesn't recognize dimensions in canadian grib2. What am I not understanding?

[alexamici]

Can you share a link to GRIB file with the problem data? (I have no idea what a "canadian grib2" is).

[Mabus00]

Alex,

Thanks for responding. I’ve attached my Jupyter Notebook code so you can see what I am trying to do – note the dates of the data are files I downloaded a few days ago. I’m using x (UGRD) and y (VGRD) winds. You can try with current data - Canadian grib2 data is available from our Meteorological Service of Canada (MSC) Datamart website and here’s a link to modelled data I am trying to use https://dd.weather.gc.ca/model_gem_regional/10km/grib2/00/001/. If you go back in the parent directory you’ll find some explanation on file name nomenclature and content, and greater access to many data files. A google search also provides a lot of links and information.

I tried different approaches, added a time dimension, used cf2cdm to ensure the coordinates were in an acceptable format, used cfgrib module methods, etc. and I keep getting the same ValueError message. I was starting to investigate how to ensure the dimensions are recognized when I thought about emailing you to see if you can help. I know there are lots of “flavours” of grib and grib2 so I’m thinking maybe that’s the issue. Thanks again.

Cheers,

Wayne M. Renaud

902-266-8476

From: alexamici [mailto:notifications@github.com] Sent: August-10-20 4:16 AM To: ecmwf/cfgrib Cc: Mabus00; Author Subject: Re: [ecmwf/cfgrib] Working with Canadian Grib2 data (#155)

Can you share a link to GRIB file with the problem data? (I have no idea what a "canadian grib2" is).

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/ecmwf/cfgrib/issues/155#issuecomment-671200017 , or unsubscribe https://github.com/notifications/unsubscribe-auth/ADSCXL5H6DRBVF4RRK74WM3R76NCRANCNFSM4PZK5EYQ . https://github.com/notifications/beacon/ADSCXL67GVZ4AHBOV3FAV7LR76NCRA5CNFSM4PZK5EY2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOFAA3GEI.gif

[Mabus00]

Hi Alex,

I haven’t heard back from you on this. Have you had an opportunity to look at the issue?

Cheers,

Wayne M. Renaud

902-266-8476

From: wayne.renaud [mailto:wayne.renaud@gmail.com] Sent: August-10-20 10:17 AM To: 'ecmwf/cfgrib'; 'ecmwf/cfgrib' Cc: 'Author' Subject: RE: [ecmwf/cfgrib] Working with Canadian Grib2 data (#155)

Alex,

Thanks for responding. I’ve attached my Jupyter Notebook code so you can see what I am trying to do – note the dates of the data are files I downloaded a few days ago. I’m using x (UGRD) and y (VGRD) winds. You can try with current data - Canadian grib2 data is available from our Meteorological Service of Canada (MSC) Datamart website and here’s a link to modelled data I am trying to use https://dd.weather.gc.ca/model_gem_regional/10km/grib2/00/001/. If you go back in the parent directory you’ll find some explanation on file name nomenclature and content, and greater access to many data files. A google search also provides a lot of links and information.

I tried different approaches, added a time dimension, used cf2cdm to ensure the coordinates were in an acceptable format, used cfgrib module methods, etc. and I keep getting the same ValueError message. I was starting to investigate how to ensure the dimensions are recognized when I thought about emailing you to see if you can help. I know there are lots of “flavours” of grib and grib2 so I’m thinking maybe that’s the issue. Thanks again.

Cheers,

Wayne M. Renaud

902-266-8476

From: alexamici [mailto:notifications@github.com] Sent: August-10-20 4:16 AM To: ecmwf/cfgrib Cc: Mabus00; Author Subject: Re: [ecmwf/cfgrib] Working with Canadian Grib2 data (#155)

Can you share a link to GRIB file with the problem data? (I have no idea what a "canadian grib2" is).

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/ecmwf/cfgrib/issues/155#issuecomment-671200017 , or unsubscribe https://github.com/notifications/unsubscribe-auth/ADSCXL5H6DRBVF4RRK74WM3R76NCRANCNFSM4PZK5EYQ . https://github.com/notifications/beacon/ADSCXL67GVZ4AHBOV3FAV7LR76NCRA5CNFSM4PZK5EY2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOFAA3GEI.gif