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<div>Hi Julio,</div>
<div> </div>
<div>I use to model Moscow (Russia) area covering about 300x300 km for grid 3 of NMM where Moscow</div>
<div>city located central position for domain 3. For ARW WRF I use 2 grids 12 & 3 km and cover a bit bigger</div>
<div>area of Moscow and around by grid 2. I use GFS forecast with nudging 6-houly and all 32 GFS levels.</div>
<div> </div>
<div>I've done a lot of test runs for different sesons and different synoptic situation and can say</div>
<div>that for more accurate 4 days forecast usage of my own ETA leveling is definitelly better</div>
<div>to compare with auto-leveling as for ARW ad so for NMM.</div>
<div>You will find attached graphs-statistics of near-surface temperature and 10m wind for airport Vnukovo</div>
<div>(Moscow) to compareAuto leveling against my one yourself. Also I attach my</div>
<div>namlist.input files as for NMM and so ARW models with the leveling I use for better output.</div>
<div> </div>
<div>Good luck,</div>
<div>Dr. Mikhail Titov</div>
<div>(Reserch Professor, New Zealand) </div>
<div>
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<div style="margin:0 0 10px 0;"><b>Sent:</b> Wednesday, June 22, 2016 at 6:18 AM<br/>
<b>From:</b> "Julio Castro" <jcastro@gac.cl><br/>
<b>To:</b> 'wrfhelp' <wrfhelp@ucar.edu>, wrf-users@ucar.edu<br/>
<b>Subject:</b> [Wrf-users] ETA levels and WRF surface winds performance</div>
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<p class="MsoNormal"><span>Dear Users and Colleagues,</span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal"><span>Does anyone have good empirical experience playing with WRF ETA levels?</span></p>
<p class="MsoNormal"><span>Can you get better performance of the model in surface winds using high density ETA levels at lower levels against using the ETA levels default option? (Leaving aside that you probably need a smaller time step)</span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal"><span>I'm asking because in one case for my surprise using the ETA levels default option was the better option by far. But I tested this only for one specific case. </span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal"><span>Kind Regards</span></p>
<p class="MsoNormal"><span> </span></p>
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<p class="MsoNormal"><b><span style="font-size: 9.0pt;font-family: Verdana , sans-serif;color: rgb(0,104,179);">Julio Castro M.</span></b></p>
<p class="MsoNormal"><span style="font-size: 8.0pt;font-family: Verdana , sans-serif;color: rgb(0,104,179);">Ingeniero Civil, MSc., PhD.</span></p>
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<p class="MsoNormal" style="line-height: 11.3pt;"><span style="font-size: 8.0pt;font-family: Verdana , sans-serif;color: rgb(0,104,179);">Jefe del Área de Modelación y Calidad del Aire</span></p>
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