1. Introduction to the WRF Modeling System
Jimy Dudhia
NCAR/MMM

2. WRF Modeling System Overview

3. Modeling System Components
WRF Standard Initialization (WRF SI)
Inputs
Grid location/levels
Terrain/land-use
Gridded fields (Grib)
Output
Surface and met. fields on WRF grid at various times [wrf_input.d01.(date)]

4. Modeling System Components
Programs real.F and ideal.F
Use same namelist and Registry as wrf.F
Function
Provide hydrostatically balanced fields for WRF model
Convert met. fields to WRF model variables
Provide fields in WRF I/O format

5. Modeling System Components
Program real.F for real-data initialization
Inputs
WRF namelist.input
Standard Initialization output
Outputs
WRF input file (wrfinput)
WRF boundary file (wrfbdy)

6. Modeling System Components
Program ideal.F for idealized cases
Inputs
WRF namelist.input
Outputs
WRF input file (wrfinput)

7. Modeling System Components
Program wrf.F
Inputs
WRF namelist.input
WRF input file (wrfinput)
WRF boundary file (wrfbdy, for real-data cases only)
Various physics data files
Outputs
WRF output file [wrfout_d01_(time)]
WRF restart files [wrfrst_d01_(time)]

8. WRF I/O Current option is NetCDF Can be plotted with NCL scripts
Can be converted to Vis5D or GrADS
Additional program: MM52WRF
Converts MM5 input to WRF input
Same output as WRF SI

9. What the WRF System does not have yet
Multiple output formats
Nesting (1-way or 2-way)
Ingest of non-Grib grids
3DVAR
Observation ingest and analysis
Land-surface model

10. WRF Modeling System Overview