We do a similar OpenDAP-related pull (using Python and the NetCDF4 library)
from NOMADS for the HRRR and have noticed oddities for quite a while.
Typically the files pass the "existence" test, in that no errors are detected
either when the NetCDF4 library creates a file handle to the remote file, nor
does the loading of data into an array for a particular variable (e.g., 1km AGL
reflectivity) fail, but the displayed graphic is *blank*. Similar to Brendon,
there is no pattern to the dropouts.
Kevin Tyle, Manager of Departmental Computing
Dept. of Atmospheric & Environmental Sciences
University at Albany
Earth Science 235, 1400 Washington Avenue
Albany, NY 12222
[mailto:ldm-users-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Brendon Hoch
Sent: Tuesday, October 18, 2016 8:24 AM
To: Patrick L. Francis <wxprofessor@xxxxxxxxx>; Karen Cooper - NOAA Affiliate
Cc: LDM <ldm-users@xxxxxxxxxxxxxxxx>; NOAAPORT <noaaport@xxxxxxxxxxxxxxxx>;
Subject: Re: [ldm-users] NOAAPort HRRR
We've noticed occasional oddities in generating HRRR products with NCL
via Opendap to NOMADS. We generate a map showing 2m Temperatures &
SLP/Radar Reflective. Most of the time it works, but occasionally, one or more
parameters are either missing or misbehaving. Last week, I started an archive
of products at http://vortex.plymouth.edu/mapwall/hrrr/archive/ to discern if
there was a pattern as to when this might be happening, but so far, no luck;
products with a file size of < 674 KB are suspect. We run our script with a 3
hour lag, which should (theoretically) be plenty of time for the model data to
arrive to NOMADS.
Brendon Hoch, M.S.
MSC 48, Boyd Science Center 319
Plymouth State University
Plymouth, NH 03264
(603)535-2818 Fax: (603)535-2723
Patrick L. Francis wrote:
> Last week I mentioned product delivery issues for HRRR, all day today
> it has been HRRR .... as an example, here is a gempak GDINFO (for
> non-gempak people... listing all variables within a grid) by forecast
> hour for the most recent HRRRR:
> notice how none of the file names are the same size.. and they all
> should be (usually around 6.6K for F000 and 6.8K for F### and gempak
> usually finds 81 grids or so :(
> Does anyone happen to know how long this will continue?
> Patrick L. Francis
> Vice President of Research & Development AerisWeather.com
> wxprofessor@xxxxxxxxx <mailto:wxprofessor@xxxxxxxxx>
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