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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Luke, Thanks for the report. You're not doing anything wrong, that query should work. It's an issue I recently hit while trying to put together some examples. We're working on the issue currently, and you can track its progress here: https://github.com/Unidata/thredds/issues/378 Thanks! Ryan > Hello, > > I've been trying to use the Unidata Siphon package for Python to download > surface observations from the current day from the Unidata THREDDS server. > Specifically, I'm accessing this catalog: > > http://thredds.ucar.edu/thredds/catalog/nws/metar/ncdecoded/catalog.html?dataset=nws/metar/ncdecoded/Metar_Station_Data_fc.cdmr > > Visiting that page, it tells me that the times when data are available go > through the current time, and checking the files there shows me that files > exist up through the current time. > > However, when I format a query to get observations within a lat-lon box in > Siphon, it gives me the following error message: > > requests.exceptions.HTTPError: Error accessing > http://thredds.ucar.edu/thredds/ncss/nws/metar/ncdecoded/Metar_Station_Data_fc.cdmr?var=air_temperature&time_start=2016-01-21T10%3A37%3A36.011117&time_end=2016-01-21T22%3A37%3A36.011141&west=-124.9&east=-66.8&north=49.4&south=24.3&accept=netcdf: > Requested time range 2016-01-21T10:37:36.011Z - 2016-01-21T22:37:36.011Z > does not intersect actual time range 2015-11-17T00:00:00Z - > 2016-01-16T00:00:00Z > > > Which is implying that the "actual time range" of data available only has > data up until five days ago, even though more recent files seem to be > available on the server. Am I using the right catalog? Any thoughts on > the problem? Ticket Details =================== Ticket ID: OKW-963505 Department: Support THREDDS Priority: Normal Status: Closed