question regarding "Combined Plotting" example...

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

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: maxb@nmsu.edu
Plant Pathology and Weed Science e-mail: max.bleiweiss@startmail.com

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