NMQ Verification System (QVS) Tutorial
Tabs: QPF
Two different Weather Research and Forecasting Models 
(WRF) can be displayed and compared to each other and gauges. Table 1 shows the characteristics of the models run at NSSL and EMC. Each model is run daily out to 36 h. Accumulations are available for 1, 3, 6, 12, and 24 h.
In addition to precipitation accumulations, composite reflectivity and lowest-level reflectivity will be added.
Note: Some buttons are not functional and are scheduled to be removed from the page.
| NCEP/EMC WRF-NMM1 | NSSL WRF-ARW2 | |
|---|---|---|
| Horiz. grid spacing | 4.0 km | 4.0 km |
| Vertical Levels | 35 | 35 |
| PBL/Turb. Param. | MYJ | MYJ |
| Microphysical Param. | Ferrier | WSM6 |
| Radiation (SW/LW) | GFDL/GFDL | Dudhia/RRTM |
| IC time | 0000 UTC | 0000UTC |
| IC/LBC source data | 12 km NAM on a 32 km grid | 12 km NCEP NAM on 40 km grid |
| Forecast Length | 36 h | 36 h |
| Output frequency | 1 h | 1 h |
| Output fields | 1 hour precip accum, simulated 1 km AGL reflectivity, simulated composite reflectivity | 1 hour precip accum, simulated 1 km AGL reflectivity, simulated composite reflectivity |
References
1Janjic, Z. I., T. L. Black, M. Pyle, H.-Y. Chuang, E. Rogers and G. DiMego, 2005: An Evolutionary Approach to Nonhydrostatic Modeling. Available at URL: http://www.wrf-model.org/wrfadmin/publications/Chuang_Janjic_NWP50yearsfinalshort.pdf
2Skamarock, W.C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, J. G. Powers, 2005: A Description of the Advanced Research WRF Version 2. NCAR Tech Note, NCAR/TN-468+STR, 88 pp. [Available from UCAR Communications, P. O. Box 3000, Boulder, CO 80307].
