MM5 model setup:

The largest domain has horizontal resolution of 27 km in both directions and extents over 58x58 grid cells. The two nested domains have 9 km resolution with 109x109 grid points and 3 km resolution with 76x76 grid points. The final domain is identical to the model (CAMx) master domain, with a 1 km resolution generated by MM5toCAMx:

cell size	grid size	extent
27 km	58 x 58	1,566 km
9 km	109 x 109	981 km
3 km	76 x 76	228 km

Central coordinates for mother (largest) model domain are: 16.2 °E, 45.6 °N The projection used in MM5 computations is Lambert-Conformal projection. The MM5 model output is converted to a UTM grid after the model run using MM5toCAMx postprocessing program.

Vertical resolution of the model domain consists of 17 levels plus surface (1000 mb). The model has a high vertical resolution near the surface to cover layering used by CAMx. The vertical levels are distributed as follows (in mb): 1000, 997, 994, 988, 976, 940, 883, 850, 780, 700, 600, 500, 400, 300, 250, 200, 150, 100.

The computational time step for the largest domain is 81 s. The timestepping increases by factor 3 for nested domains. Approximately 3 times horizontal grid resolution in km. Model output frequency is 1 h. Integration time of the model is 26 h. First 2 h of model simualtion are discarded as initial adjustment. Therefore, data are imported and displayed for 24 h corresponding to local time 00:00 to 24:00 h. The model setup takes into account the local time shift from UTC (1 hour), start time of simulation is at 21:00 UTC "today" and end time is at 24:00 UTC "tomorrow". The first 2 hours are discarded.

MM5 model uses following databases:

• MM5.MM5_scenario:   information about MM5 setup
• AIRMATRIX:   matrix results for temperature, wind field (precipitation, solar radiation, cloud cover under development)
• MONITORING_TS:   timeseries for temperature, wind speed, wind direction, pressure, humidity, precipitation.

MM5 INPUT DATA:

MM5 forecast is based on results of NCEP GFS Forecasts data. The GFS input data are available on resolution 1 °x1° with time interval of 3 hours. Datasets used include surface pressure, sea level pressure, geopotential height, temperature, sea surface temperature, relative humidity, u- and v- wind vector components.
The subdomain for GFS data downloaded for various project areas currently covers

latitude	10°	N -	60°	N
longitude	0°	- 360°

• nomad1 = "http://nomad1.ncep.noaa.gov/cgi-bin/ftp2u_gfs.sh"
• nomad3 = "http://nomad3.ncep.noaa.gov/cgi-bin/ftp2u_gfs.sh"
• nomad5 = "http://nomad5.ncep.noaa.gov/cgi-bin/ftp2u_gfs.sh"
• nomad6 = "http://nomads6.ncdc.noaa.gov/cgi-bin/ftp2u_gfs.sh"