[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: (#MQD-9803417) question regarding "Combined Plotting" example...



-#-#- Please reply above this line -#-#-

Dear Max Bleiweiss,

Your ticket has been marked as resolved by a member of our staff. If you do not believe that this issue has been adequately resolved, you may still reply to this ticket and an operator will respond shortly. You can review the ticket by going to:
https://support.unidata.ucar.edu/tickets/view/MQD-9803417?token=de3826e208cd74887492a4b1bca1d9c456a5506e
Ryan May
Staff - Wednesday 4th September 2024 3:54 PM

Greetings!

 

My apologies for the confusion. MetPy's "Combined Plotting" example is plotting contours of temperature (at the 850 hPa pressure level) on top of the Geopotential Height (again of the 850 hPa fixed pressure level). The native format of NARR gridded data is GRIB and can be found here:

 

https://www.ncei.noaa.gov/thredds/catalog/model/narr.html

 

Using this THREDDS server, in addition to downloading the raw files (using HTTPServer), you can also get a link for accessing using the OPENDAP protocol (can be given directly to `xarray.open_dataset()`) or download a subset in netCDF format using the NetCDF Subset Service.

 

I'm surprised MetPy's `narr_example.nc` doesn't load with QGis, or especially Panoply, since this is a CF-compatible netCDF file.

 

Hope this helps,

 

Ryan

Hi Ryan,

My new question did not involve the old issues with the surface wx map -- it was entirely different and involved the sample program which seems to use a NARR pressure file; but doesn't...it shows an overlay of a pressure field on a temperature field...

Sorry to be so much trouble...

Regards,

Max



Max P. Bleiweiss, M.S., F.R.A.S.
Agricultural Research Scientist (ret.)
New Mexico State University mobile: +1 575.640.2275
Department of Entomology, e-mail: address@hidden
Plant Pathology and Weed Science e-mail: address@hidden

***
"We enjoy thoroughly only the pleasure that we give."
Alexandre Dumas
***

 


Max Bleiweiss
User - Wednesday 4th September 2024 5:11 AM

Hi Ryan,

My new question did not involve the old issues with the surface wx map -- it was entirely different and involved the sample program which seems to use a NARR pressure file; but doesn't...it shows an overlay of a pressure field on a temperature field...

Sorry to be so much trouble...

Regards,

Max



Max P. Bleiweiss, M.S., F.R.A.S.
Agricultural Research Scientist (ret.)
New Mexico State University mobile: +1 575.640.2275
Department of Entomology, e-mail: address@hidden
Plant Pathology and Weed Science e-mail: address@hidden

***
"We enjoy thoroughly only the pleasure that we give."
Alexandre Dumas
***

________________________________________
From: NSF Unidata MetPy, Siphon (Python) <address@hidden>
Sent: Tuesday, September 3, 2024 8:51 PM
To: Max Bleiweiss
Subject: RE: (#MQD-9803417) question regarding "Combined Plotting" example...

WARNING This email originated external to the NMSU email system. Do not click on links or open attachments unless you are sure the content is safe.

Ryan May
Staff - Tuesday 3rd September 2024 2:50 PM

Greetings!

 

The challenge here is that NARR, or North American Regional Reanalysis, is generally composed of fields of things like temperature and humidity on a regular grid. I'm guessing the products you linked to are some kind of automatically generated frontal locations on the basis of these gridded fields. Either way, the frontal locations as encoded in the netCDF file seems like something that a lot of software isn't necessarily geared to handle, so it's going to require some manual effort on your end to get these to work--I've never worked with these.

 

Cheers,

 

Ryan

 


Max Bleiweiss
User - Saturday 31st August 2024 1:47 PM

Greetings,

I did try stackoverflow and found it very confusing and difficult to invoke -- perhaps, it is just my old age...so, thank you for being there...

Anyway, the sample netcdf file provided for use in subject sample program in not readable by either Panoply or QGIS -- I was trying those tools so that I could learn more about how to use a "real" NARR file -- could you please recommend a real NARR file that might work in that example?

Regards,

Max

Max P. Bleiweiss, M.S., F.R.A.S.
Agricultural Research Scientist (ret.)
New Mexico State University           mobile: +1 575.640.2275
Department of Entomology,             e-mail:  address@hidden
  Plant Pathology and Weed Science e-mail:  address@hidden

***
"We enjoy thoroughly only the pleasure that we give."
Alexandre Dumas
***e

Ticket Details

Ticket #: MQD-9803417
Subject: question regarding "Combined Plotting" example...
Department: MetPy, Siphon (Python)
Status: Closed
Priority: Normal

You can review the ticket by going to:
https://support.unidata.ucar.edu/tickets/view/MQD-9803417?token=de3826e208cd74887492a4b1bca1d9c456a5506e

Kind Regards,
NSF UnidataNOTE: All email exchanges with NSF Unidata User Support are recorded in the NSF Unidata support portal. Inquires to some departments are made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.