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

[python #JWY-361331]: Siphon Library Question

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [python #JWY-361331]: Siphon Library Question
  • Date: Mon, 15 Aug 2022 19:40:15 -0600
Greetings!

Where are you trying to download the NAM grib2 files from? From our THREDDS 
server at https://thredds.ucar.edu ?

Siphon will work fine for downloading any files being served directly by a 
THREDDS server, but it does not handle any parsing of the files. To do so in 
Python would require other libraries like pygrib, or xarray together with 
cfgrib. That's why frequently in our examples we rely on having the THREDDS 
Data Server handle parsing the GRIB/GRIB2 files and return data in 
easier-to-use formats like netCDF or CSV.

Cheers!

Ryan

> Hello,
> 
> I am trying to use the siphon library to access NOAA NAM grib2 files. Is 
> there a way download multiple grib2 files with this library, or does this 
> only do one file? Also, can this work with grb2 files?
> 
> 
> THREDDS Catalog — Siphon 0.8 
> (unidata.github.io)<https://unidata.github.io/siphon/latest/examples/Basic_Usage.html#sphx-glr-examples-basic-usage-py>
>  [example I followed]



Ticket Details
===================
Ticket ID: JWY-361331
Department: Support Python
Priority: Low
Status: Closed
===================
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata 
inquiry tracking system and then 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.