The WMO HydroHub supports National Meteorological and Hydrological Services and other monitoring organizations in the design and implementation of training opportunities related to hydrological data collection, management, and sharing. Topics of the trainings are selected to respond to the most pressing NMHSs needs, with preference given to common challenges identified across a range of NMHSs. Across all the trainings, the focus will be placed on exploring the possibilities provided by cost-effective innovative approaches and/or technologies.