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I found the root of issue.<br>
<br>
NMM nest has to be exactly in the center of parent domain. Now it is
OK.<br>
<br>
Ivan<br>
<br>
<br>
<br>
On 07/08/2012 11:12 PM, Ivan Toman wrote:
<blockquote cite="mid:4FF9F7BC.5030500@inet.hr" type="cite">
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Thanks for reply,<br>
<br>
yes PDEF values are correct. Investigating further confirms that
it is not issue in describing and reading gribs but in WRF
somewhere. Shifting of topography and domain distorting happens
only in the nest domain, whereas mother domain has absolutely
correct placed landmask and other fields.<br>
<br>
It looks that I need to search for solution in WRF...<br>
<br>
Ivan<br>
<br>
<br>
<br>
On 07/08/2012 08:25 PM, Jeff Duda wrote:
<blockquote
cite="mid:CAAig09AsN+n-JXkGhPFxxa3Wu1JLW7Z0G4W3dRHsd3qXt_VPVA@mail.gmail.com"
type="cite">I use <a moz-do-not-send="true"
href="http://grib2ctl.pl">grib2ctl.pl</a> and gribmap as well,
but I use different flags. What does the -verf flag do in <a
moz-do-not-send="true" href="http://grib2ctl.pl">grib2ctl.pl</a>?
Also, I use the -e -i flags for gribmap instead of just -i.
<div> <br>
</div>
<div>Also, have a close look at your PDEF line and make sure you
are using the exact same values for the projection as what is
in the grib file. Use wgrib -V WRFPRS... to see what those
values are (i.e., standard lat, center lon, etc).<br>
<br>
Jeff</div>
<div><br>
<div class="gmail_quote">On Sun, Jul 8, 2012 at 11:27 AM, Ivan
Toman <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ivtoman@inet.hr" target="_blank">ivtoman@inet.hr</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hello Jeff,<br>
<br>
I just set manually latitude and longitude for GrADS map
display, little bit wider than WRF domain is, just to
see exactly where it's borders are and what exact shape
it has.<br>
<br>
Data set is grib output from wrfpost, ctl file is
created by <a moz-do-not-send="true"
href="http://grib2ctl.pl" target="_blank">grib2ctl.pl</a>
-verf wrfgribfile >wrf.ctl and then gribmap -i
wrf.ctl.<br>
<br>
Something is wrong. It looks that GrADS is OK, because I
can confirm that same shift happens in Panoply software.
So it is certanly issue in wrfpost (i think) or in wrf.
Probably not topic for this mailing list, but still
maybe someone will know the solution?<br>
<br>
Thanks again,<br>
Ivan
<div>
<div class="h5"><br>
<br>
<br>
<br>
On 07/08/2012 06:01 PM, Jeff Duda wrote:
<blockquote type="cite">Ivan,
<div>Exactly which control file and data set are
you using to plot the land/sea mask in the
attached image? You said you are trying to
display WRF output. The domain looks like you
are running over your own domain, but you said
you plotted data from the WRF NMM. This
difference may cause the aberrant behavior.
<div> <br>
</div>
<div>Jeff Duda<br>
<br>
<div class="gmail_quote">On Sun, Jul 8, 2012
at 6:53 AM, Ivan Toman <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:ivtoman@inet.hr"
target="_blank">ivtoman@inet.hr</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex"> Hello,<br>
<br>
I have issues displaying WRF output in
GrADS. The problem happens because
coordinate system in GrADS (or in WRF
gribs?) seems to be somehow misshaped.
Attached image clearly shows example of my
issue. So on the image, in color is
plotted land/sea mask from WRF NMM grib
file. However, on the NorthWest part of
domain, and on the SouthEast part of
domain, land/sea mask is tottaly out of
order according to GrADS coordinating
system! As you can see, Great Britain
islands are moved in southwest direction
almost 3 degrees, and Greece/Turkey is
moved in northeast direction, and whole
shape of domain is somehow deformed.<br>
<br>
I postprocess with wrfpost and then create
ctl and idx with <a
moz-do-not-send="true"
href="http://grib2ctl.pl"
target="_blank">grib2ctl.pl</a> and
gribmap and use opengrads for display.<br>
<br>
I'm currently unable to find why this
missalignment as described above happen.
Is it problem in GrADS, WRF, or
postprocessor?<br>
<br>
Thanks for any idea.<span><font
color="#888888"><br>
Ivan Toman<br>
</font></span><br>
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<br>
<br clear="all">
<div><br>
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-- <br>
Jeff Duda<br>
Graduate research assistant<br>
University of Oklahoma School of Meteorology<br>
Center for Analysis and Prediction of Storms<br>
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-- <br>
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Graduate research assistant<br>
University of Oklahoma School of Meteorology<br>
Center for Analysis and Prediction of Storms<br>
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