em_quarter_ss simulation with own sounding providing messy vertical wind patterns

Hi,

I am trying to simulate 3-D quarter-circle shear supercell simulation with my own input sounding data. My output vertical velocity plot looks messy. I run my simulation with the default input sounding data and got the same kind of plot when I increased the number of grid boxes from the default 42 to 162 and run for three hours. I used the default namelist variables except for grid the number of grid boxes along east-west and north-south directions. I applied vertical dumping option, used 6th order diffusion option, changed dumping coefficient but failed to solve the problem. I am enclosing my simulation output and looking forward to your help to sort this put.


Thanks in advance,
Mostofa

Did you every get an answer for this?

It doesn't appear to me that anything is wrong with your simulation. There is some noise in the W field but it's not much more than in the control case.



Dave Nolan

Mostofa,
Can you change the mp_physics to WSM3 and see whether the problem is gone? We found a bug in recently in Kessler scheme and we are trying to fix this issue.I am not sure whether this is the reason for the messy vertical velocity.