Verification of a Real Time Weather Forecasting System in Southern Italy

Figure 13

The RMSE difference (ΔRMSE) between the forecast without and with the application of the MOS for temperature (a), relative humidity (b), wind speed (c), and wind direction (d) for different forecasting times (-axis). Positive values of ΔRMSE show an improvement of the forecast using MOS. The solid line shows the ΔRMSE averaged over the 50 applications of the MOS. The boxes delimit the 25th and 75th percentile, while the error bar spans between the maximum and minimum values of the 50 applications of the MOS. The dotted line shows the difference between the RMSEs for the model configuration with one grid (12 km horizontal resolution) and two nested grids (3 km horizontal resolution). A positive value of ΔRMSE represents a better performance for the 3 km horizontal resolution.

(a)

(b)

(c)

(d)