#!/usr/bin/env python
# coding: utf-8

# In[1]:


import urllib.request
import Nio
import xarray as xr


# In[2]:


url='http://thredds.ucar.edu/thredds/fileServer/grib/NCEP/WW3/Regional_Alaska/WW3_Regional_Alaska_20171012_0000.grib2'
fname = 'ww3_test.grib2'


# In[3]:


urllib.request.urlretrieve(url, fname)


# In[4]:


nc = Nio.open_file(fname)


# In[5]:


nc.variables


# In[6]:


ds = xr.open_dataset(fname, engine='pynio')


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