Winds of the North Sea in 2050 (WINS50): wind speed, wind direction, temperature, pressure and relative humidity at 10-600 meter height from a reanalysis for 2020 with the NWP model HARMONIE-AROME nested in the ECMWF reanalysis ERA5. The HARMONIE-AROME simulation includes a wind farm parameterization (Fitch et al., 2012) using a 2050 scenario for turbine locations and properties over sea and over land. Data are stored as time series for individual grid points in a subdomain covering the Netherlands. More information on: www.wins50.nl.