Hi all,<br> I am another one encountered the similar issue.<br> My 15km/5km Tropical Cyclone landfall auto move nest case become unstable with mp=2(Lin et al) like<br><font size="1"><br style="font-family: trebuchet ms;">
<span style="font-family: trebuchet ms;">Timing for main: time 2005-10-02_09:31:30 on domain 2: 6.02100 elapsed seconds.</span><br style="font-family: trebuchet ms;"><span style="font-family: trebuchet ms;"> 2005-10-02_09:31:30 vortex center (in nest x and y):
49.02061 51.36514</span><br style="font-family: trebuchet ms;"><span style="font-family: trebuchet ms;"> 2005-10-02_09:31:30 grid center (in nest x and y): 50.00000 50.00000</span><br style="font-family: trebuchet ms;">
<span style="font-family: trebuchet ms;"> 2005-10-02_09:31:30 disp : -0.9793892 1.365143</span><br style="font-family: trebuchet ms;"><span style="font-family: trebuchet ms;"> 2005-10-02_09:31:30 move (rel cd) : 0 0
</span><br style="font-family: trebuchet ms;"><span style="font-family: trebuchet ms;">Timing for main: time 2005-10-02_09:31:30 on domain 1: 28.20500 elapsed seconds.</span><br style="font-family: trebuchet ms;"><span style="font-family: trebuchet ms;">
5336 points exceeded cfl=2 in domain 2 at time 33.53333 hours</span><br style="font-family: trebuchet ms;"><span style="font-family: trebuchet ms;"> MAX AT i,j,k: 98 81 30 cfl,w,d(eta)= NaN
7.4782795E-03 2.1000000E-02</span><br style="font-family: trebuchet ms;"><span style="font-family: trebuchet ms;">Timing for main: time 2005-10-02_09:32:00 on domain 2: 18.47500 elapsed seconds.</span><br style="font-family: trebuchet ms;">
<span style="font-family: trebuchet ms;"> 13050 points exceeded cfl=2 in domain 2 at time 33.54167 hours</span><br style="font-family: trebuchet ms;"></font><br> Reducing time step length to 75s or changing gird res to 18km/6km seems no help.
<br> But with mp=6(wsm6), it seems ok.<br> Any further comment would be appreciated.<br><br>--<br>Grus<br><br><br><div><span class="gmail_quote">On 5/6/06, <b class="gmail_sendername"><a href="mailto:wrf-users-request@ucar.edu">
wrf-users-request@ucar.edu</a></b> <<a href="mailto:wrf-users-request@ucar.edu">wrf-users-request@ucar.edu</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<br>Today's Topics:<br><br> 1. Re: trouble with 2-way nest (John Krasting)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Thu, 4 May 2006 15:30:22 -0400<br>From: "John Krasting" <
<a href="mailto:krasting@cep.rutgers.edu">krasting@cep.rutgers.edu</a>><br>Subject: Re: [Wrf-users] trouble with 2-way nest<br>To: "<a href="mailto:mpborkow@ncsu.edu">mpborkow@ncsu.edu</a>" <<a href="mailto:mpborkow@ncsu.edu">
mpborkow@ncsu.edu</a>><br>Cc: <a href="mailto:wrf-users@ucar.edu">wrf-users@ucar.edu</a>, WRF Help <<a href="mailto:wrfhelp@ucar.edu">wrfhelp@ucar.edu</a>><br>Message-ID:<br> <<a href="mailto:640db780605041230k4731388fg3f5675e0ae381c36@mail.gmail.com">
640db780605041230k4731388fg3f5675e0ae381c36@mail.gmail.com</a>><br>Content-Type: text/plain; charset="iso-8859-1"<br><br>Dear Matt,<br><br>I am now trying to run WRF with the NARR data and I've encountered the exact
<br>same problem that you had back in October. Have you been able to make any<br>progress on this problem or do you have any new advice I could try?<br><br>Thanks,<br>John Krasting<br>Rutgers Univ.<br><br><br>On 10/17/05, John Krasting <
<a href="mailto:krasting@cep.rutgers.edu">krasting@cep.rutgers.edu</a>> wrote:<br>><br>> 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
<br>> 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
<br>> 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
<br>> 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>
> > _______________________________________________<br>> > Wrf-users mailing list<br>> > <a href="mailto:Wrf-users@ucar.edu">Wrf-users@ucar.edu</a><br>> > <a href="http://mailman.ucar.edu/mailman/listinfo/wrf-users">
http://mailman.ucar.edu/mailman/listinfo/wrf-users</a><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>><br><br><br><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
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