[Wrf-users] Problem with Katrina Tutorial case

James Correia jimmyc42 at gmail.com
Mon Mar 15 21:24:36 MDT 2010

Hi Bob-
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.
Or it can happen if the model top is too low (200 mb or sometimes 100 mb).

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.

Other people have posted about resolution of this problem on the wrf user


On Sun, Mar 14, 2010 at 6:31 PM, Robert J. Ballentine <
robert.ballentine at oswego.edu> wrote:

> Hello,
>  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
> timesteps. It seems to be failing in the model physics routines. The model
> fails with the default namelist parameters (cu_physics = 1), and with
> cu_physics = 0. Attached are the namelist and logfiles for both attempts.
> The model prints a number of error messages like:
>  WOULD GO OFF TOP: KF_ETA_PARA I,J,DPTHMX,DPMIN            2            2
>       NaN    5000.000
> Any suggestions will be appreciated.
> Thanks,
>  Bob
> _______________________________________________
> Wrf-users mailing list
> Wrf-users at ucar.edu
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James Correia Jr.
Post Doc
Climate Physics Group, PNNL
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