Hi Bob-<br>This error is generated specifically by the KFeta cumulus scheme. It occurs because the presumed parcel path for deep convection exceeds model top. This can happen because the low level instability is too large: SST too large and low level lapse rates too steep.<br>
Or it can happen if the model top is too low (200 mb or sometimes 100 mb).<br><br>This can also be a problem if the model is unstable and the vertical velocity is too large due to CFL condition violations (these warnings should appear in the rsl output files). Check your timestep for this case.<br>
<br>Other people have posted about resolution of this problem on the wrf user forum:<br><a href="http://forum.wrfforum.com/">http://forum.wrfforum.com/</a><br><br>jimmyc<br><br><br><br><div class="gmail_quote">On Sun, Mar 14, 2010 at 6:31 PM, Robert J. Ballentine <span dir="ltr"><<a href="mailto:robert.ballentine@oswego.edu">robert.ballentine@oswego.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hello,<br>
We are trying to run the Katrina single grid tutorial case using WRF-ARW v3.1. We did not add the SST data. We are able to run the WPS and real.exe successfully, but wrf.exe fails with a Segmentation fault after a few<br>
timesteps. It seems to be failing in the model physics routines. The model<br>
fails with the default namelist parameters (cu_physics = 1), and with<br>
cu_physics = 0. Attached are the namelist and logfiles for both attempts.<br>
The model prints a number of error messages like:<br>
WOULD GO OFF TOP: KF_ETA_PARA I,J,DPTHMX,DPMIN 2 2<br>
NaN 5000.000<br>
Any suggestions will be appreciated.<br>
Thanks,<br>
Bob<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>James Correia Jr.<br>Post Doc<br>Climate Physics Group, PNNL<br><br>