One Year of Operational Numerical Weather Prediction

This article is the first of two brief reports on the activities and results of the Joint Numerical Weather Prediction Unit since the inauguration of routine numerical forecasting in May 1955. Following a broad statement of the Unit's objectives and a short chronology of the main changes of procedure over the past year, a description is given in general terms of the data processing and numerical forecasting routines of the JNWP Unit, together with the content and form of the numerical forecasts. The second report will deal with the accuracy and typical errors of such forecasts, as well as with the JNWP Unit's efforts to improve them.