Table 2: Model configuration for case study forecasts.
| Model category | Option |
|---|
| Grid dimensions | 247 x 147 x 25 |
| Horizontal grid increment | 25 km |
| Vertical grid increment | 10 hPa stretched to 50 hPa |
| Model top pressure | 100 hPa |
| Topography | Derived from USGS 30-second dataset |
| Initialization | 1) Derived from NCEP AVN model |
| 2) LAPS derived from NWS observations |
| 3) LAPS derived from NWS observations plus QSCAT winds |
| Thermodynamics | nonhydrostatic |
| Reisner2 microphysics |
| Radiation | Includes the effects of cloud water and ice |
| Cumulus parameterization | One-cloud scheme (Grell 1993) |
| Lateral boundary condition | Davies (1976) relaxation to AVN forecasts |
| Top boundary condition | Klemp and Durran (1983) |
| Surface boundary condition | 0.2 m, 4-level soil model
|
| Soil temperature, moisture, and snow cover initialized from NCEP RUC analysis |