I start my run 6 hours after the initialisation time (for example 06Z to run the 00Z).
I would download analysis file (06Z) in order to increase the performance and limited perturbation.
I try ems_prep with analysis term but I have the message :
.Analysis doesn't have a dolorean...
I also see this : http://www.mmm.ucar.edu/wrf/users/wrfda/.
As anyone try starting run with both forecast file and analysis file ?