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</o:shapelayout></xml><![endif]--></head><body lang=EN-SG link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hello,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I’ve remarked that sometimes when I run a simulation (WRF3.4) I got messages saying “ x points exceeded cfl=2 at time…” <u>but the simulation run to completion</u>.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-SG'><img width=1037 height=576 id="Picture_x0020_2" src="cid:image001.jpg@01CDB837.EDF30050"></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>How can this affect the results? What can I do to solve this instabilities, run a higher time step?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks a lot in advance!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Elena<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=360 style='width:270.0pt'><tr><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>Elena Pison San Pedro<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>M.Sc. in Atmospheric Sciences</span><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr style='height:15.0pt'><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm;height:15.0pt'><p class=MsoNormal style='line-height:15.0pt'><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'> </span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-SG'><img width=150 height=38 id="Picture_x0020_1" src="cid:image002.gif@01CDB837.EDF30050" alt="Description: C:\Users\mmc\AppData\Roaming\Microsoft\Signatures\dhi_logo.gif"></span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr style='height:7.5pt'><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm;height:7.5pt'><p class=MsoNormal style='mso-line-height-alt:7.5pt'><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'> </span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>DHI-NTU Research Centre and Education Hub,<o:p></o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=360 style='width:270.0pt'><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>DHI Water & Environment (S) Pte Ltd</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>1 Clean Tech Loop</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>#03-05 CleanTech One</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>Singapore 637141</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr></table></td></tr><tr><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm'><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=360 style='width:270.0pt'><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr></table></td></tr><tr><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm'><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=360 style='width:270.0pt'><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr><tr><td valign=top style='padding:0cm 0cm 0cm 0cm'></td></tr></table></td></tr><tr style='height:7.5pt'><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm;height:7.5pt'><p class=MsoNormal style='mso-line-height-alt:7.5pt'><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'> </span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr style='height:6.0pt'><td width=50 valign=top style='width:37.5pt;padding:0cm 0cm 0cm 0cm;height:6.0pt'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>Tel: </span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td><td width=5 valign=top style='width:3.75pt;padding:0cm 0cm 0cm 0cm;height:6.0pt'><p class=MsoNormal style='mso-line-height-alt:6.0pt'><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'> </span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td><td width=305 valign=top style='width:228.75pt;padding:0cm 0cm 0cm 0cm;height:6.0pt'><p class=MsoNormal style='mso-line-height-alt:6.0pt'><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'>+65-6777-6330</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:EN-SG'><o:p></o:p></span></p></td></tr><tr style='height:7.5pt'><td colspan=3 valign=top style='padding:0cm 0cm 0cm 0cm;height:7.5pt'><p class=MsoNormal style='mso-line-height-alt:7.5pt'><span 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