CSTools (short for Climate Service Tools) is an R package that contains process-based methods for climate forecast calibration, bias correction, statistical and stochastic downscaling, optimal forecast combination, and multivariate verification, as well as basic and advanced tools to obtain tailored products. In addition to describing the structure and methods in the package, we also present three use cases to illustrate the seasonal climate forecast post-processing for specific purposes.

In the frame of MEDSCOPE project, a seasonal forecast empirical model for the Mediterranean is proposed. It uses a sub regions based set up, with different inputs for every area, from an initial set of global climate indices. However, is configurated to be able to easily incorporate other sources of information. Results show spatially consistent structure, and measurements of its skill shows it performs at the level (and better over some areas) of main dynamical models for seasonal forecasting.

This is a web-based toolbox created to support decision-making process by water managers in Spanish reservoirs. It provides a set of tools to explore hydrologic variability linked to climate variability and a precipitation/reservoir inflow seasonal forecast over Spain.