To bet20
ter understand the meteorological evolution of the event the instantaneous radiance at
IR 10.8 μm and the rain rate (RR in mmh−1) registered from MSG (Meteosat Second
Generation) and estimated from the Italian national radar network are shown (Fig. 2).
In the early afternoon the precipitation is restricted to the urban area of Rome (RM,
Fig. 2a), to reach later the south-eastern part of RM with local showers (Fig. 2b). In
25 the evening, precipitation occurred again on the urban area of RM (Fig. 2c), while at
22:00UTC, the rainfall moved toward east close to L’Aquila (AQ, Fig. 2d).