[ncl-talk] Plotting nam winds on regional map

[Andrew Kren - NOAA Affiliate]

Thanks Mary! I will try these things you mention. Will let you know if I
still encounter problems. And to answer your question, no, I didn't get any
errors when the program ran.

On Mon, Dec 21, 2015 at 11:56 AM, Mary Haley <haley at ucar.edu> wrote:

> Hi Andrew,
>
> Setting "trGridType" to TriangularMesh will not work for vectors.  This is
> currently only available for contours.  We have it on our list to do this
> for vectors, but it could be awhile before we get to it. However, you
> shouldn't need this in your case. You have 2D lat/lon arrays, which you can
> generate vectors from without needing a triangular mesh.
>
> Are you getting any kind of error message when you execute this NCL script?
>
> To debug this, I suggest first removing this line, since it won't work
> anyway:
>
>        vres at trGridType="TriangularMesh"
> and then temporarily commenting these two lines so that the vector plot
> will actually get drawn when "gsn_csm_vector" is called, and you can make
> sure it looks okay:
>
> ;       vres at vfXArray = lon2d
> ;       vres at vfYArray = lat2d
>
>
> If you continue to have problems, then it would help if you could provide
> an updated script *and* the data file. You can use our ftp for the data
> file:
>
> http://www.ncl.ucar.edu/report_bug.shtml#HowToFTP
>
> --Mary
>
>
> On Sat, Dec 19, 2015 at 10:16 AM, Andrew Kren - NOAA Affiliate <
> andrew.kren at noaa.gov> wrote:
>
>> I have a script that I run in real-time to generate NAM forecast output
>> at various pressure levels and plot variables. Attached is my script. I
>> also attached a plot of the 500 mb heights/vorticity from the program.
>>
>> For some reason, I cannot get the u and v winds to plot, meaning the wind
>> barbs will not show up on the plot. I followed the convention for a 2 deg
>> lat/lon grid, since NAM is on a lon2d/lat2d grid. I used gsnAddCyclic =
>> false, declared my vfXArray and vfYArray, and used TriangularMesh for my
>> grid, the same settings I used for plotting the vorticity, which showed up
>> fine. I am thus stumped why the winds won't show up. Any advice is most
>> appreciated. Sorry for the long ncl code.
>>
>> Thanks,
>>
>> --
>> Andrew Kren, PhD
>> Research Scientist I, Global Observing Systems Analysis (GOSA) Group
>> NOAA ESRL Global Systems Division (Rm 3C515)
>> 325 Broadway, Boulder, CO 80305
>> (303) 497-5418
>>
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>>
>


-- 
Andrew Kren, PhD
Research Scientist I, Global Observing Systems Analysis (GOSA) Group
NOAA ESRL Global Systems Division (Rm 3C515)
325 Broadway, Boulder, CO 80305
(303) 497-5418
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