Hi wrfusers,<br> I am working with wrf nmm v2.2.1 using wps to pre-process the my case data. When I have run the module using 1 tile (1 cpu), the the post processed wrfout files look fine ;however when I have used multiple cpus (multitiles) and subtracted its wrfout files from the single cpu run, there has been a significant variation over a particular latitude belts or region on the domain .<br><br>1- Does anyone know what possibly has gone wrong? <br> 2- How I can identify the top pressure value for my input data?do you think this could be the reason?<br><br>Your help is highly appreciated.<br>Abra<br><p> 
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