Precipitation forecasts at the Canadian Meteorological Centre

David Davies; Marvin P. Olson

doi:10.3402/tellusa.v25i1.9643

Precipitation forecasts at the Canadian Meteorological Centre

Tellus

Volume 25 (1973): Issue 1

By: David Davies and Marvin P. Olson

Open Access

|Jan 1973

Abstract

Operational forecasts of precipitation amount are produced by a numerical scheme which uses the dew point depression as the moisture parameter. The onset of large scale precipitation occurs gradually when the dew point depression decreases below a threshold value. Small scale precipitation is divided into several meteorological components and each of these is parameterized separately. Improvements were recently obtained by reducing the horizontal grid spacing from 381 km to 190.5 km.

References

Asselin , R . 1967 . The operational solution of the balance equation. Tellus 19 , 24 – 32 .
Search in Google Scholar Back to article
Danard , M. B . 1964 . On the influence of released latent heat on cyclone development. J. Appl. Meteor . 3 , 27 – 37 .
Search in Google Scholar Back to article
Danard , M. B . 1966a . A quasi-geostrophic numerical model incorporating effects of release of latent heat. J. Appl. Meteor . 5 , 85 – 93 .
Search in Google Scholar Back to article
Danard , M. B . 1966b. Further studies with a quasi-geostrophic numerical model incorporating effects of released latent heat. J. Appl. Meteor. 5,388-395.
Search in Google Scholar Back to article
Davies , D . 1967 . Three-layer numerical forecasts of precipitation amount. Canadian Meteorological Memoirs 25 , 92 pp .
Search in Google Scholar Back to article
Davies , D and Olson, M. P. . 1968 . Operational fore-casts of 24-hour precipitation amount from the Central Analysis Office Computer. Canada De-partment of Transport, Meteorological Branch TEC . 670 , 28 pp .
Search in Google Scholar Back to article
Davies , D . 1970 . Computations of tomorrow's rain . Ph.D. Thesis , McGill University , Montreal , 485 pp .
Search in Google Scholar Back to article
Fulks , J. R . 1935 . Rate of precipitation from adia-batically ascending air. Mon. Wea. Rev . 63 , 291 – 294 .
Search in Google Scholar Back to article
Godson , W. L. 1958. Atmospheric Thermodynamics. Canada Department of Transport, Meteorological Branch, special publication, 117 pp .
Search in Google Scholar Back to article
Harvey , R . 1969 . Some experiments with telescop-ing grids in a baroclinic model . M.Sc. Thesis, McGill University , Montreal .
Search in Google Scholar Back to article
Kruger , H. B . 1965 . A statistical dynamical objective analysis scheme. Canadian Meteorological Memoirs 18 , 40 pp .
Search in Google Scholar Back to article
Kruger , H. B. and Asselin , R. J. M . 1967 . A statistical dynamical objective analysis scheme: Supplement no. 1. Canadian Meteorological Memoirs 23 , 38 pp .
Search in Google Scholar Back to article
Kruger , H. B . 1969 . A statistical dynamical objective analysis scheme: Supplement no. 2. Canadian Meteorological Memoirs 27 , 119 pp .
Search in Google Scholar Back to article
Kwizak , M. and Davies , D . 1969 . Numerical forecasts of 24-hour precipitation amount. Proceedings of the World Meteorological Organization International Union of Geodesy and Geophysics Symposium on Numerical Weather Prediction , Tokyo , 26 Nov.-4 Dec. 1968 , Meteorological Service of Japan , 10 pp .
Search in Google Scholar Back to article
Kwizak , M. and Robert , A. J . 1971 . A semi-implicit scheme for grid point atmospheric models of the primitive equations. Mon. Wea. Rev . 99 , 32 – 36 .
Search in Google Scholar Back to article
Paulin , G. and Olson , M. P . 1972 . Experiments with a four-level fine mesh baroclinic model . Canadian Meteorological Research Reports , 17 pp .
Search in Google Scholar Back to article
Robert , A. J . 1963 . Baroclinic prediction experi-ments with a four-level statistical-dynamical model. Canadian Meteorological Memoirs 15 , 32 pp .
Search in Google Scholar Back to article
Robert , A. J. , Henderson , J. D. and Turnbull , C. C . 1972 . An implicit time integration scheme for baroclinic models of the atmosphere. Mon. Wea. Rev ., 100 , 329 – 335 .
Search in Google Scholar Back to article
Smithsonian Meteorological Tables . 1958 . Rate of precipitation from adiabatically ascending air. Smithsonian Institute , Washington, D.C. , pp. 325 - 326 .
Search in Google Scholar Back to article

Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v25i1.9643 | Journal eISSN: 3035-9554

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Language: English

Page range: 43 - 57

Submitted on: Jul 7, 1972

Published on: Jan 1, 1973

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1973 David Davies, Marvin P. Olson, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 25 (1973): Issue 1