Re: Overlay NCEP fnl data upon wrfout data

From: Mary Haley <haley_at_nyahnyahspammersnyahnyah>
Date: Mon Jan 10 2011 - 09:19:08 MST

Hi Alice,

The overlay should work find between the two sets of functions. You
have to be sure that you either have the map projection right (this is
a wrf_xxx requirement), and/or that you have lat/lon information for
your data so that NCL knows where to overlay the data.

If you can provide your script and data, I should be able to help you
fix the problem.

Please see the instructions at
for providing your files.



On Jan 8, 2011, at 9:18 PM, Lisi wrote:

> Dear Sir,
> I have tried a lot to overlay NCEP fnl_* (GRIB1) files upon WRF ARW
> output files,which I want to compare the sea level pressure and
> other variables of each data. But I can't find an efficient way to
> do that. I used general gsn_csm_contour_map function to plot the fnl
> data and use wrf_map_overlays to plot wrfout data separately and
> then use overlay(plot1,plot2) functions trying to overlay
> them,failed of course because they have different data set. And
> actually I can't get the same figure attributes such as size,
> projection angles and etc with the gsn_csm_contour_map function and
> the wrf_map_overlays function. Since I really love the figure format
> created by wrf_map_overlays, I tried again to draw the fnl data with
> wrf functions which may need to modify the data attributes in
> the .grb files and I don't know how.
> So,would you please kindly help me out of this problem?
> Thank you very much.
> Best Regards
> Alice
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Received on Mon Jan 10 09:19:13 2011

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