Re: contouring water vapor (g/kg) with RUC data

From: Rick Brownrigg <brownrig_at_nyahnyahspammersnyahnyah>
Date: Tue Jan 14 2014 - 12:09:29 MST

Hi Brian,

The short answer is, the lat/lon coordinates have become disassociated with the qvap_out_xxx variables somewhere along the way in their calculation. I'm not sure offhand where, or what to do about it -- I'll investigate further, but perhaps you know how?

FWIW…
Rick

On Jan 14, 2014, at 9:50 AM, "brianjs @iastate.edu" <brianjs@iastate.edu> wrote:

> Good Afternoon,
>
> I am attempting to plot water vapor mixing ratio (calculated to be in g/kg) contoured with wind barbs. Unfortunately, I cannot get the contours to appear. I am using the same exact routine that I did for contouring wind magnitudes (which contours just fine).
>
> The only difference is that my water vapor mixing ratio variable (qvap) has to be calculated instead of being drawn directly as a variable from the model itself. This should not make a difference though. I checked the status of the qvap variable (using printVarSummary, printMinMax, and print) and the numbers look excellent at all levels, with no missing values or anything else out of the ordinary. By deductive reasoning, it should be easy to contour like the wind magnitude. I honestly do not know what could be wrong with the variable data and why it cannot be contoured. Perhaps the numbers are distributed in such a way that they cannot be contoured properly? Perhaps I need another special resource? I appreciate any input that can be provided.
>
> I am attaching the code with problems contouring the water vapor (ruc_qheight.ncl), as well as the similar code that does work for wind magnitudes (ruc_wheight.ncl) so that they can be compared/contrasted (if necessary). I also imported my data file (via ftp) which is the cat_file.cdf. The images attached are with wind magnitude contours (which works) and qvapor contours (which are missing).
>
> Again, any help would be greatly appreciated.
>
> Brian Squitieri
> Graduate Research Assistant
> Iowa State University
> <qvap_contour00.png><ruc_qheight.ncl><wnd_mag_contour00.png><ruc_wheight.ncl>_______________________________________________
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Received on Tue Jan 14 12:10:16 2014

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