Choices for Nesting are:0 no nesting (only available for serial and smpar) 0. no nesting (only available for serial and smpar)1. basic2. preset moves preset moves3. vortex following
• 	default is option 0 for serial/smpar, 1 for dmpar
•	smpar = Shared Memory Parallelismdmpar = Distributed Memory Parallelism

what is nesting

A nest is a finer-resolution model run. 
It may be embedded simultaneously within a coarser-resolution (parent) model run, or run independently as a separate model forecast. The nest covers a portion of the parent domain, and is driven along its lateral boundaries by the parent domain.