I am running a wrf-les ideal simulation to generate some convections with stratus already existing. I modify the source code "/dyn_em/module_initialize_ideal.F" as attached file to initialize stratus. When it comes to about 45 mins, the convections begin to generate. However, the result is completely different when changing the grid number in namelist.input. When I changed the gird number from "e_we = 400, e_sn = 400" to "e_we = 401, e_sn = 401", there is no convections during the whole simulation time (2 hours). And the convections regenerated again when "e_we = 402, e_sn = 402" and "e_we = 403, e_sn = 403". Did anyone meet the similar question? What are the reasons?
