On June 18, 2019 at the 2019 International Supercomputing Conference in Frankfurt, Germany, Cray Inc. announced that the Swiss National Supercomputing Centre (CSCS) is adding a third Cray® CS-Storm™ supercomputer with Cray ClusterStor® storage to support the development of weather service products at the Swiss Federal Office of Meteorology and Climatology (MeteoSwiss). The new CS-Storm system will join two Cray supercomputers already on site at CSCS, used by MeteoSwiss to run production weather forecasting. The job of the newly-accepted CS-Storm is to allow MeteoSwiss to run larger ensemble predictions and higher resolution weather models to improve forecast accuracy. MeteoSwiss found success with its existing Cray supercomputers and selected this new CS-Storm to provide the additional computational power required to process increasing volumes of weather observations and produce higher fidelity forecasts. The CS-Storm system was also selected for its ability to run numerical weather forecasts within a reduced energy footprint (as compared to competing solutions), and for the reliability the platform provides MeteoSwiss when running critical workloads. CSCS’ new CS-Storm® is configured with 18 compute nodes, each with 8 NVIDIA® V100 GPUs and 2 Intel® Xeon® Gold 6134 CPUs, and includes two Cray ClusterStor® L300 storage systems. The CS-Storm was accepted in April 2019 and will become fully operational in 2020.