I am using the siphon package to extract NEXRAD Level 3 data following the example in this link: https://unidata.github.io/siphon/latest/examples/Radar_Server_Level_3.html. But it appears that the available datasets are empty. Does anyone know why and if there is a different package that I need to use to access NEXRAD Level 3 products? Thanks.
from datetime import datetime
import matplotlib.pyplot as plt import numpy as np
from siphon.cdmr import Dataset from siphon.radarserver import get_radarserver_datasets, RadarServer
ds = get_radarserver_datasets('http://thredds.ucar.edu/thredds/') print(list(ds))
url = ds['NEXRAD Level III Radar from IDD'].follow().catalog_url rs = RadarServer(url)
print(rs.variables)
query = rs.query() query.stations('FTG').time(datetime.utcnow()).variables('N0Q')
rs.validate_query(query)
catalog = rs.get_catalog(query)
print(catalog.datasets)
The short answer is that the National Weather Service replaced the N?Q family of products (Digital Base Reflectivity) with "super-resolution" counterparts that have the identifier N?B, where ? refers to the elevation of the product.
So for the example you reference, replace N0Q with N0B and everything should work as before.