Description of WRF-EMS Model
at LWX
Links:
Information about the
WRF-EMS modeling package
General information about the
WRF Model
Run Times:
The model is run every 6 hours to a forecast time of 24 hours. The table
below describes model start times and which files are used for each model
run:
Initialization Time |
Start Time |
Initialization (LAPS) |
Boundary Conditions (NAM12) |
Web Post Time |
00Z |
01Z |
00Z |
18Z (6hr fcst) |
0615Z |
06Z |
07Z |
06Z |
00Z (6hr fcst) |
1215Z |
12Z |
13Z |
12Z |
06Z (6hr fcst) |
1815Z |
18Z |
19Z |
18Z |
12Z (6hr fcst) |
0015Z |
LAPS analysis is performed each hour at :20 minutes. There are 31 levels
and a resolution of 10 km. The LAPS analysis uses the RUC20 to for its background
fields, and is available about 10 minutes prior to the model start time.
The model is run on an 2 CPU 32 bit Linux workstation.
The model domain is 122x208 with a resolution of 4 km.
Post processing is completed on an additional dual processor Linux PC
(2.6 GHZ) for display of model information on AWIPS.
General Model Settings (These may vary at times):
Model Computational Domain Information
Note: MOAD - Mother Of All Domains
WRF Core : Non-hydrostatic Mesoscale Model (NMM)
Number of Domains : 1
MOAD Grid Dimensions (W-ExS-N) : 122x208
MOAD Grid Spacing : 4.0 km
Map Projection : rotlat
MOAD Center Lat/Lon : 38.3,-78.7
MOAD Timestep : 9 seconds
Vertical NMMH Levels : 31
Pressure at Model Top : 50 mb
WRF Run Dynamics Configuration
Model Dynamics : Non Hydrostatic
Time Integration : Runge-Kutta 3rd Order
Turbulence and Mixing Option : Evaluates Mixing Terms in Physical Space
Eddy Coefficient Option : Horizontal Smagorinsky First Order Closure
Upper Level Damping : Off
Vertical Velocity Damping : On
WRF Run Physics Configuration
Cumulus Scheme : No Cumulus Scheme
Microphysics Scheme : Ferrier Microphysics
Boundary Layer Scheme : Mellor-Yamada-Janjic
Boundary Layer Timestep : 3 Minutes
Land-Surface Scheme : NMM Land Surface Model
Number of Soil Layers : 4
Source of Landuse and Soil Data : Standard Initialization (SI)
Surface Layer Scheme : Monin-Obukhov (Janjic Eta) Scheme
Long Wave Radiation : GFDL Long Wave Radiation Scheme (NMM only)
Short Wave Radiation : GFDL Short Wave Radiation Scheme (NMM only)
Radiation Timestep : Auto Minutes
Back to WRF index page
|