[Wrf-users] Is it a must to run wrf with a nest

[afwande juliet]

Dear users
I am running wrf using era interim which is at 83km resolution. I am
downscaling to about 16KM nest
It's very slow. I even deactivated the parent domain so that I only get
output from nest to reduce runtime but still takes 84hrs to run 3months
simulation which is too slow.

What would be the danger if I run without nest to reduce runtime

Would there be any mismatch between the driving data and the model
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