Simulation data:

1) Bolam model (version 2014) horizontal resolution 0.075 degrees in rotated coordinates (about 8 km), 50 atmospheric levels
2) Moloch model (version 2014) horizontal resolution 0.014 degrees in rotated coordinates (about 1.5 km), 50 atmospheric levels
3) IFS-ECMWF (Cycle 40r1) horizontal resolution 0.25 degrees, 91 atmospheric levels
4) Cosmo-I7 model horizontal resolution 0.065 degrees in rotated coordinates (about 7 km), 40 atmospheric levels
5) Cosmo-I2 model horizontal resolution 0.025 degrees in rotated coordinates (about 2.8 km), 45 atmospheric levels
6) Bolam model (version 2013) horizontal resolution 0.1 degrees in rotated coordinates (about 11 km), 50 atmospheric levels, named on plots "Bolam_old"
7) Moloch model (version 2013) horizontal resolution 0.02 degrees in rotated coordinates (about 2.3 km), 50 atmospheric levels, named on plots "Moloch_old"

Observation data:

WMO GTS, Synop-Land, ECMWF archive
Data at 0, 3, 6, 9, 12, 15, 18, 21 UTC

2 sets of observation points:

Stations in the whole Bolam domain (about 3000 points)

Italian stations (about 150 points)

Time series of errors as a function of forecast term

Errors in observation points for various forecast terms