This activity has expanded the MERIDA dataset to the period 1990-2018. Thanks to a 29-year temporal coverage, climate can be assessed based on the tendency of some weather events to occur with less or greater frequency on the Italian territory. The availability of a meteorological reanalysis dataset allows network operators to obtain all the key information to adopt appropriate solutions with a view to both strengthen the networks and prepare the mitigation/intervention measures needed to maintain/restore the energy supply service in those areas subject to significant phenomena and with a high impact on the national electricity system. In MERIDA, the definition of the temperature and humidity variables at different depths in the soil has been refined. The performance of MERIDA has been compared with other reanalysis datasets being implemented at national level within the CORINA project. Following the MERIDA outputs, some very intense meteorological phenomena such as the Piedmont flood in November 1994 and some wet-snow events critical for the electricity grid have been reconstructed and quantified.

As part of the Resilience Table, a preliminary study has been conducted to identify the areas with the greatest criticality for strong winds in Italy. The comparative and check analysis of the sleeve loads on the conductors of the overhead lines obtained with the Makkonen growth model, corresponding to the faults reported by the electric utilities, has continued profitably. This activity is the subject of study by a specific CEI CT 11/7 Working Group – Check of the maps of the expected loads set out in the CEI EN 50341-2-13 Standard for the updating of the maps themselves – in which RSE, e-distribuzione, Terna and CESI participate. Additional fitting methods have been developed within the GEV for the estimation of the expected values of sleeve loads on typical cables of the HV and MV network and for different return times, for the purpose of updating the reference legislation. These reconstructions are still the subject of study, sharing, and improvement by the Work Group established by the CEI.

Finally, the architecture of the MERIDA portal has been finalized and ample space has been given to actions of communication and dissemination of the results obtained at national and international level.