Operational Configuration

Non-Hydrostatic Modeling
The non-hydrostatic modelling area is based on a COSMO model. COSMO-ME is integrated over the Euro-Mediterranean area with a 5km grid spacing and 45 vertical levels using COMET-LETKF control analysis as initial state and IFS forecast fields as lateral boundary conditions. The main features of the operational implementations of the COSMO-ME are summarized in the following table:

Model COSMO
Domain size 1083x559
Grid spacing 0.045° (5km)
Number of layers / top 45 / ~22 Km
Time step and integration scheme 45 sec Runge-kutta HE-VI time-splitting
Forecast range/step 72 hrs/1 h
Initial time of model run 00/06/12/18 UTC
Lateral boundary conditions IFS (ECMWF)
L.B.C. update frequency 3 hrs
Initial state LETKF determistic analysis
Initialization Digital Filter (Work in progress)
External analysis snow cover,SST
Status Operational
ADDITIONAL FEATURES Provides atmosferic forcing to the NETTUNO sea state model (WAM) 3’ resolution


The convection permitting COSMO-IT model is integrated over the Italian area with a 2.2 km grid spacing and 65 vertical levels using the high-resolution LETKF control analysis as initial state and IFS forecast fields as lateral boundary conditions. The main features of the operational implementations of the COSMO-IT are summarized in the following table:


Model COSMO
Domain size 576x701
Grid spacing 0.02° (2.2km)
Number of layers / top 65 / ~22 Km
Time step and integration scheme 20 sec Runge-kutta HE-VI time-splitting
Forecast range 48 (00-12UTC) / 30 (06-18 UTC) hrs
Initial time of model run 00/06/12/18 UTC
Lateral boundary conditions Most recent IFS-HRES run (ECMWF)
L.B.C. update frequency 1 h
Initial state High-resolution det. LETKF analysis
Initialization None
External analysis SST
Special features Filtered topography
Status Operational

COSMO-IT DOMAIN: