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 2019-2021 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 realistic turbine locations and properties over sea and over land for the simulated years. Data are stored as daily files for a subdomain covering the Netherlands. More information on: www.wins50.nl.