<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Kostas,<div class=""><br class=""></div><div class="">Sorry for the late reply. Are you aware of the following bug (with an easy fix) in WRFV3.7 and later?</div><div class=""><br class=""></div><div class=""><a href="http://www2.mmm.ucar.edu/wrf/users/wrfv3.8/known-prob-3.8.1.html" class="">http://www2.mmm.ucar.edu/wrf/users/wrfv3.8/known-prob-3.8.1.html</a> </div><div class=""><br class=""></div><div class="">Seems this might be hurting you.</div><div class=""><br class=""></div><div class="">Cheers</div><div class=""><br class=""></div><div class="">Dom</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 2/11/2016, at 10:56 AM, kostas markakis <<a href="mailto:konstantinos.markakis@lmd.polytechnique.fr" class="">konstantinos.markakis@lmd.polytechnique.fr</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Good morning to everyone,<br class=""><br class="">I am experiencing a strange behaviour of a very cold temperature bias when using WRF 3.8.1 (em_real case). I have run the same simulation with version 3.6.1 and i am getting a bias of -1o Celsius. With 3.8.1 i get -7. Has anyone had similar behaviour? I attach my namelist. My domain is the area around Paris, France the topography is relatively flat, away from coastal areas. I am using the BEP urban model. I have tried additionally 2 configurations (changing some schemes with no urban model) only with 3.8.1 and i always get a very cold bias in the order of -5,-6.<br class=""><br class="">I have to note two things:<br class=""><br class="">1) with the 3.8.1 version i get this strange message in metgrid:<br class=""><br class="">"Note: The following floating-point exceptions are signalling: IEEE_OVERFLOW_FLAG IEEE_UNDERFLOW_FLAG IEEE_DENORMAL"<br class=""><br class="">2) i never managed to compile WRF3.8.1 with the default flags in configure.wrf. In order to work i had to include several new flags (i attach my configure.wrf)<br class=""><br class="">Thanks in advance<br class=""><br class="">-- <br class=""><br class="">Konstantinos Markakis<br class="">Post-doctoral researcher<br class="">LMD (Laboratoire de Meteorologie Dynamique), IPSL<br class="">Université Pierre et Marie Curie, 4 Place Jussieu<br class="">e-mail: <a href="mailto:konstantinos.markakis@lmd.polytechnique.fr" class="">konstantinos.markakis@lmd.polytechnique.fr</a><br class=""><br class=""><span id="cid:16488F3B-A31E-43D6-85DF-2EDAB912F1F0@imk-ifu.kit.edu"><namelist.input></span><span id="cid:665A6C56-64A7-4A75-8A39-B6E8FE5C5902@imk-ifu.kit.edu"><configure.wrf></span>_______________________________________________<br class="">Wrf-users mailing list<br class=""><a href="mailto:Wrf-users@ucar.edu" class="">Wrf-users@ucar.edu</a><br class="">http://mailman.ucar.edu/mailman/listinfo/wrf-users<br class=""></div></div></blockquote></div><br class=""></div></body></html>