Model Output Statistics (MOS) is the technique of post-processing the output from numerical weather forecast model using statistics of local historical or actual weather measurements.
Pure statistical models are excellent at "Nowcasting" (forecasting short-term local weather) but are usually worthless beyond about six hours.
The MOS technique combines the model output and statistics , by using the complex numerical models based on the physics of the atmosphere to forecast the large-scale weather patterns and then using regression equations in statistical post-processing to clarify surface weather details.
The accuracy is generally better than either a pure statistical model or a pure numerical model (NWP).

meteoblue offers MOS services for temperature, wind, as well as for certain applications with precipitation and radiation .