The foreword by Peter Lynch provides an overview of the historical and scientific significance of Lewis Fry Richardson's work on numerical weather prediction. Richardson, who developed the first systematic method for predicting weather using numerical approximation, laid the foundation for modern weather forecasting and climate modeling. His methods, though initially criticized and failed in a trial forecast, have proven to be fundamentally sound and are now central to atmospheric simulation. The book, *Weather Prediction by Numerical Process*, published in 1922, outlines Richardson's algorithm for solving nonlinear partial differential equations, which describe atmospheric flows. Despite initial setbacks, Richardson's work has been instrumental in advancing the field, leading to the development of more accurate and reliable weather forecasts. The book's influence is evident in the continued use of his methods and the ongoing improvements in weather prediction and climate modeling.The foreword by Peter Lynch provides an overview of the historical and scientific significance of Lewis Fry Richardson's work on numerical weather prediction. Richardson, who developed the first systematic method for predicting weather using numerical approximation, laid the foundation for modern weather forecasting and climate modeling. His methods, though initially criticized and failed in a trial forecast, have proven to be fundamentally sound and are now central to atmospheric simulation. The book, *Weather Prediction by Numerical Process*, published in 1922, outlines Richardson's algorithm for solving nonlinear partial differential equations, which describe atmospheric flows. Despite initial setbacks, Richardson's work has been instrumental in advancing the field, leading to the development of more accurate and reliable weather forecasts. The book's influence is evident in the continued use of his methods and the ongoing improvements in weather prediction and climate modeling.