Hi folks,
For me, one of IDV's strong points has been its ability to work with
numerous data formats -- but I've finally managed to trip it up.
I tried to load up NARR Composite data in netCDF format, taken from the
ESRL web site:
http://ow.ly/3LCt2
The above link shows a plot consisting of mwN 700mb Vector Winds from 3
Dates/Times, using NARR. Towards the bottom there are links to download
the plotted data in netCDF format for both the U and V-wind components.
When downloading these files and trying to load them in IDV, it balks
about not finding any gridded data in them. I've tried several 'file
type' options.
When doing the same thing, except using the NCEP/DOE Reanalysis 2
dataset, I have no problems plotting the netCDF data in IDV:
http://ow.ly/3LCxt
One note on the ESRL website mentions that the NARR data is
pre-projected in Lambert Conformal, and this may be what is tripping up
the IDV (though I thought netCDF was supposed to be self-describing when
it comes to data projections and domains, etc). There are no explicit
instructions from ESRL about using the NARR netCDF data with IDV, but
they do provide tips for other software such as GrADS:
http://www.esrl.noaa.gov/psd/data/narr/format.html
Now, if I download the raw NARR data for individual dates/times in Grib
format, IDV handles it just fine. But ESRL's website makes it easy to
create composites, whereas I would not really know where to start if I
wanted to manually create composites using the Grib data (probably could
figure it out with GrADS, but I'm just not there yet).
Does anyone have a ready-to-go solution to allow NARR composite data
from ESRL to display in IDV?
Thanks,
-Mike Hardiman
National Weather Service
WFO EPZ - El Paso, TX / Santa Teresa, NM
