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Hi Elena, <br>
<br>
another thing you could try is to add:<br>
smooth_cg_topo = .true.<br>
under &domains in the namelist when you run real. This smoothes
the model topography to match the low resolution topography that
comes with the driving data, if CFL happens along boundary zones. If
CFL occurs near complex terrain, you may try to set epssm=0.2 ( up
to 0.5) to see if that helps.<br>
[from <a href="http://www.mmm.ucar.edu/wrf/users/FAQ.html">http://www.mmm.ucar.edu/wrf/users/FAQ.html</a>]<br>
<br>
Also remember to scale your time step with the maximum map factor of
your domain. This value is written out in the log files of real.exe.
The time step is then: dt (sec) = 6*dx (km) / (maximum map factor)<br>
<br>
All the best!<br>
<br>
Jan<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Am 01.11.2012 06:51, schrieb Elena
Maria Pison San Pedro:<br>
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">I’ve
remarked that sometimes when I run a simulation (WRF3.4) I
got messages saying “ x points exceeded cfl=2 at time…” <u>but
the simulation run to completion</u>.<o:p></o:p></span></p>
<p class="MsoNormal"><span
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">How
can this affect the results? What can I do to solve this
instabilities, run a higher time step?<o:p></o:p></span></p>
<p class="MsoNormal"><span
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thanks
a lot in advance!<o:p></o:p></span></p>
<p class="MsoNormal"><span
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<p class="MsoNormal"><span
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regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
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<p class="MsoNormal"><span
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