Scheduled Downtime
On Friday 21 April 2023 @ 5pm MT, this website will be down for maintenance and expected to return online the morning of 24 April 2023 at the latest

WRF Time step value in case of lat-lon projection?

This post was from a previous version of the WRF&MPAS-A Support Forum. New replies have been disabled and if you have follow up questions related to this post, then please start a new thread from the forum home page.

What should be the time step value in case of using lat-lon projection in wps? Usually we use 6*dx or less if the dx in km. But now dx is in degree (i.e. 0.2x0.2). 6*0.2 becomes 1.2 sec now. It takes so long to complete the simulation. Please help.
Even if you run with lat-lon projection, you can still get grid intervals in km, and I believe you need to specify DX (and DY) in km in namelist.input. Then you can follow the normal formula to obtain time step. I don't think you should set DX = 0.2 (degree) in your namelist.input.