Method for increasing the spatial resolution of a weather forecast

A method for increasing spatial resolution of a weather forecast, in which predicted meteorological parameters are available for grid points of a first grid and predicted meteorological parameters are interpolated to grid points of a second grid so as to obtain interpolated meteorological parameters, wherein the grid points of the second grid have a higher spatial resolution than the grid points of the first grid, and wherein:

• a first time series for each of the grid points of the second grid is present, each first time series relating to past output quantities that are obtained via a meteorological analysis method being configured to interpolate measured data of meteorological parameters determined in weather measuring stations to the grid points of the second grid;
• for each of the grid points of the second grid;
• data is provided describing a statistical correlation between the first time series of past output quantities of the meteorological analysis method and a second time series of meteorological parameters that have been predicted in the past at grid points of the first grid;
• the provided data describing the statistical correlation is used to determine, from meteorological parameters predicted for the future and available for the grid points of the first grid, predicted output quantities of the meteorological analysis method for the grid points of the second grid;
• and
• a synthesis step of the meteorological analysis method is performed with the predicted output quantities to obtain forecasts of the meteorological parameters in the grid points of the second grid.