On 21 August 2012, NCEP will be upgrading the Short-Range Ensemble Forecast System (SREF). Details on the upgrade are available in the NWS TIN 12-30.
This is a significant upgrade as the models that the SREF is made of will be changing. Currently the SREF is comprised of individual Eta, RSM, WRF NMM and WRF ARW members. With the upgrade, the Eta and RSM members will be removed and NMMB members will be added. The native horizontal resolution of all the members will be increased to 16km. In addition, physics-scheme diversity will increase, as will initial condition diversity.
With this significant change, we wanted to share our updated NWP reference that Shawna Cokley developed. The reference provides details on the run time, number of forecast hours, horizontal grid spacing, vertical levels, and output frequency along with details on how the modeling system handles convection, microphysics, radiation, initial/boundary conditions and more. NWP systems contained in the reference include the RAP, NAM, NAM NMM-B nest, GFS, GEM, ECMWF, along with a variety of convection allowing models as well as the NAEFS and the SREF.
If you have any comments or notice any items that need attention, please let us know.
NWP Configuration and Setup Reference – http://www.erh.noaa.gov/rah/science/rah.nwp.reference.pdf