Is there anyway to read grib file without download it?(directly from the link)

Question

grbs = pygrib.open(
   'https://www.ncei.noaa.gov/data/north-american-mesoscale-model/access/historical/forecast/202001/20200101/nam_218_20200101_0600_024.grb2')
grb = grbs.read(1)[0]

This is what I am trying to do, but it gives me the following error

The link has no issue, since i can use that link and download the file in the local machine, and use pygrib.open to read file from local machine, But now I am having trouble to read file directly from the link. I read through pygrib documentation, it seems like they did not provide a way to do that. Is there any way can read grib file drectly from link?

Answer 1

You can use GDAL's Network Based File Systems. You simply have to add the /vsicurl/ prefix to the URL. Then you can access the data and all their properties.

For example:

from osgeo import gdal

ds = gdal.Open('/vsicurl/https://www.ncei.noaa.gov/data/north-american-mesoscale-model/access/historical/forecast/202001/20200101/nam_218_20200101_0600_024.grb2')
data = ds.ReadAsArray()