<div>Dear Matt,</div>
<div> </div>
<div>I am now trying to run WRF with the NARR data and I've encountered the exact same problem that you had back in October. Have you been able to make any progress on this problem or do you have any new advice I could try?
</div>
<div> </div>
<div>Thanks,</div>
<div>John Krasting</div>
<div>Rutgers Univ.<br><br> </div>
<div><span class="gmail_quote">On 10/17/05, <b class="gmail_sendername">John Krasting</b> <<a href="mailto:krasting@cep.rutgers.edu">krasting@cep.rutgers.edu</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">I can't help you very much, but I encountered the problem with a<br>12km/4km two way nested run using GFS data. I also played with the
<br>time step by it didn't help. I changed my resolution to 15km/5km and<br>the problem resolved. I never figured out why WRF didn't like the<br>12km/4km configuration.<br><br>-John<br><br>On 10/17/05, <a href="mailto:mpborkow@ncsu.edu">
mpborkow@ncsu.edu</a> <<a href="mailto:mpborkow@ncsu.edu">mpborkow@ncsu.edu</a>> wrote:<br>> I am running a two-way nest, 12km outer domain with a 4km inner domain<br>> using a NARR dataset. The setup seems to be fine but I am having trouble
<br>> with the model run itself. I do get one ouput file for each domain for<br>> the initialization time only. The SLP from these output files match up<br>> well with the reanalysis data in some spots, in other spots the SLP seems
<br>> very artificial with the isobars looking erratic. Here is a sampling of<br>> the errors I am getting:<br>><br>> Timing for Writing wrfout_d01_2004-03-16_00:00:00 for domain 1:<br>> 21.71200 elapsed seconds.
<br>> Timing for processing lateral boundary for domain 1: 5.28800<br>> elapsed seconds.<br>> WRF NUMBER OF TILES = 1<br>> 90190 points exceeded cfl in w_damp<br>> (module_big_step_utilities_em.F)
<br>> MAX AT i,j,k: 174 60 30 cfl,w,d(eta)=<br>> nan nan 2.1000000E-02<br>> Timing for Writing wrfout_d02_2004-03-16_00:00:00 for domain 2:<br>> 18.27400
elapsed seconds.<br>> WRF NUMBER OF TILES = 1<br>> 21257 points exceeded cfl in w_damp<br>> (module_big_step_utilities_em.F)<br>> MAX AT i,j,k: 5 55 30 cfl,w,d(eta)=
<br>> nan 3.5428979E-02 2.1000000E-02<br>> 41992 points exceeded cfl in w_damp<br>> (module_big_step_utilities_em.F)<br>> MAX AT i,j,k: 10 55 30 cfl,w,d(eta)=
<br>> nan 5.5973802E-02 2.1000000E-02<br>><br>> -------------- FATAL CALLED ---------------<br>> FATAL CALLED FROM FILE: module_cu_kfeta.b LINE: 2054<br>> KAIN-FRITSCH, istop=1, diags<br>
> -------------------------------------------<br>> [4] MPI Abort by user Aborting program !<br>> [4] Aborting program!<br>><br>><br>> My first thought was that it was a time step issue, but my time step is
<br>> set at 60s for the 12km domain, 20s for the 4km domain. I did try<br>> reducing them to 48s and 16s, but this did not solve the problem. Given<br>> the final error, looks like there may be some error with the KAIN-FRITSCH
<br>> scheme, which I only have running on the 12km domain. Does anyone have<br>> any thoughts as to what the problem may be? Thanks!<br>><br>> -Matt<br>><br>> _______________________________________________
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<br>><br><br><br>--<br>****************************************************<br>John Krasting<br><br>Center for Environmental Prediction<br>Rutgers University<br>14 College Farm Road<br>New Brunswick, NJ USA 08901-8551
<br>Phone: +1-732-932-3890<br>Fax: +1-732-932-8644<br>****************************************************<br></blockquote></div><br><br clear="all"><br>-- <br>****************************************************<br>John Krasting
<br>Meteorologist, Graduate Assistant<br>Center for Environmental Prediction<br>Department of Environmental Sciences<br>Rutgers University<br>ENRS Building, Room 201<br>14 College Farm Road<br>New Brunswick, NJ USA 08901-8551
<br>Phone: +1-732-932-3890<br>Fax: +1-732-932-8644<br>Email: <a href="mailto:krasting@envsci.rutgers.edu">krasting@envsci.rutgers.edu</a><br>****************************************************<br>