The highlights of the research and operational procedures related to computer weather forecasting in Canada over the last fifteen years are documented. The research includes contributions in developing quantitative precipitation forecasting, time-dependent boundaries to restricted area forecasts, semi-implicit methods of solving the primitive equations to extend the time interval of integration from ten minutes to one hour, and spectral models of the atmosphere. An essential part of the resume is the close cooperation that exists between scientists of the U.S.A. and Canada in developing numerical weather prediction models. In addition, the Canadian operational program has been designed to make use of the hemispheric primitive equation forecasts from the U.S.A. while concentrating on developing “quick forecasts” based on the RADAT observations and on limited area fine mesh models.

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1 Formerly Head, Dynamic Prediction Research Unit, Montreal and now A/Director, Air Quality Research Branch, Toronto.