Following the research undertaken within IMPREX, this White Paper provides:

- a synopsis of the current state-of-the-art of atmospheric and hydrological forecasting, with a focus on medium-range to seasonal scales of prediction for increased preparedness

- the lessons learnt from IMPREX including the current forecast weaknesses identified and the need for the local tailoring of forecast output

- a vision for how to improve these forecast systems/products in future research and operations.