Golden Horseshoe WX runs the Weather Research and Forecasting (WRF) model on a daily basis. The areal coverage of the domain encompasses all of southern and central Ontario and part of northern Ontario. The model uses the operational 12-km NMM model (NAM 218) for boundary conditions, while the 3-km HRRR model is used for initial conditions. The Green Vegetation Fraction, 3-km CONUS LIS model and 2-km Northern Hemisphere Sea Surface Temperature (SST) products - courtesy of NASA SPoRT - are used for surface conditions.
The model does not use a cumulus parameterization scheme, so convection is produced explicitly.
Information about the model:
General Model Settings (These may vary at times):
| Model Computational Domain Information | |
|---|---|
| WRF Core | : ARW |
| Domain Type | : Limited Area |
| Primary Time Step | : Adaptive |
| Step to Output Time | : Yes |
| Grid Dimensions (NX x NY) | : 235 x 212 |
| Grid Spacing | : 4.00 km |
| Vertical Layers (NZ) | : 40 |
| Top of Model Atmosphere | : 75mb |
| Parent Domain | : NA |
| Model Physics Configuration | |
| Cumulus Scheme | : None |
| Shallow Cumulus Scheme | : Off |
| Microphysics Scheme | : Thompson 6-Class DM |
| PBL Scheme | : Yonsei University |
| YSU Wind Correction | : UW Terrain Variance-Relates |
| Gravitational Settling | : No Gravitational Settling |
| Land-Surface Scheme | : Noah 4-Layer LSM |
| Snow Cover Physics | : New School |
| Number Land Categories | : 21 (MODIS + Lakes) |
| Number Soil Categories | : 16 |
| Number of Soil Layers | : 4 |
| Surface Layer Physics | : Monin-Obukhov |
| Sfc Heat & Moisture Flux | : Model Computed u* and Sfc Fluxes |
| Long Wave Radiation | : RRTM |
| Short Wave Radiation | : Dudhia |
| SW Update Calls | : Update SW Radiation |
| Short Wave Scattering | : 1 x10-5 m2/kg |
| Cloud Effects | : Cloud Effects On |
| Slope Radiation Effects | : Slope Effects On |
| Topography Shading | : Shading Effects On |
| Max Shade Length | : 25 Km |
| ARW Core Model Dynamics | |
| Dynamics | : Non-Hydrostatic |
| Time-Integration Scheme | : Runge-Kutta 3rd Order |
| Diffusion Scheme | : Simple Diffusion |
| 6th-order Diffusion | : No 6th-Order Diffusion |
| Eddy Coefficient Scheme | : 2D 1st Order Closure |
| Damping Option | : No Damping |
| W Damping | : W Damping On |
| Horiz Momentum Advection | : 5th Order |
| Horiz Scalar Advection | : 5th Order |
| Vert Momentum Advection | : 3rd Order |
| Vert Scalar Advection | : 3rd Order |
| Sound Time Step Ratio | : Automatic |
| Moisture Advection Option | : Positive-Definite |
| Scalar Advection Option | : Positive-Definite |
| Momentum Advection Option | : Positive-Definite |
| TKE Advection Option | : Positive-Definite |
More information
Looking for more information about the WRF EMS model? Please visit the Science and Training Resource.
For general information regarding the WRF model, please see WRF Model Users Page.
