UEMS Postprocessing and displaying results

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Posts: 3
Joined: Tue Oct 15, 2019 1:12 pm

UEMS Postprocessing and displaying results

Post by egoipse123 » Wed Oct 16, 2019 7:25 am

Hi all,

I am really struggeling displaying any UEMS (19.8.1) grib2-data. I am surprised since I would have expected this (visualization) to be the easiest part.

I just got through the UEMS tutorial found here http://strc.comet.ucar.edu/software/uem ... pter04.pdf. Now, after running ems_post, I happily created my grib2-files (I guess they are..) with names like 1910150000_wrfout_arw_d01.grb2f000000 up to .. .grb2f240000. I now spent several hours testing different programs (like XyGrib, Sailgrib, OpenCPN..) that are supposed to be suited for displaying grib2-files. None of them could open these files. I am lost here. I also tried ncl and vapor..but that direction seemed a bit excessive to me.

Can you give me advice? Is there any tutorial on how to plot data (2D maps, like wind, temperature etc.) from my UEMS simulations? Which program are you using?

Thanks for help,

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Joined: Wed Aug 19, 2009 10:05 am

Re: UEMS Postprocessing and displaying results

Post by meteoadriatic » Wed Oct 16, 2019 6:59 pm


This is actually most tedious part because there is basically no-existent any automation for final products. You need to do it on your own.

My recommendation:
1) Go into config of your domain and in post_uems.conf turn on GrADS:
(change to YES)

Postprocess your run again.

Then fire up grads (in you're on linux, just try "grads" in the shell, if you're on windows I don't know but you can try the same in command prompt, maybe?).

Then in grads open ctl file created along with grib file (it will be now .ctl and .idx files there after you postprocess with GRADS=YES option).

Then, go here:

and learn basics there, and then for more here:

I believe that is your best course of action... it might seem complicated at first but you will be glad you did learn it eventually.

Posts: 3
Joined: Tue Oct 15, 2019 1:12 pm

Re: UEMS Postprocessing and displaying results

Post by egoipse123 » Fri Oct 18, 2019 2:50 pm


perfect, thanks for the answer.

I'll dig through all of it.

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