00000nam 2200000zi 4500 9.956885 CaOODSP 20251030104235 m o d f cr bn||||||||| 251030s1964 oncdb ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- En57-56/509-1964E-PDF McLeod, D. D., author. Analysis of some winter NWP flow patterns near B.C. / D.D. McLeod. [Toronto, Ontario] : Department of Transport, Meteorological Branch, 1964. 1 online resource (8 pages, 13 unnumbered pages) : maps, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier TEC ; 509 Digitized edition from print [produced by Environment and Climate Change Canada]. "24 Feb. 64." "CIR 3994." Includes bibliographical references (page 8). "Data extracted from the numerical 500-mb 36-hour prognostic charts prepared by the U.S. Weather Bureau National Meteorological Centre (NMC) for December, 1962, and for January and February of 1963, verified over a twelve-point grid; the errors in the barotropic and baroclinic prognoses were compared, and the general error pattern-discussed. Since the actual vorticity field at 500 mbs was available at 12-hourly intervals on the same series of charts, an attempt was made to relate the occurrence of precipitation at Vancouver, Prince George and Port Hardy to values of the actual vorticity and its 12-hourly change. These vorticity parameters then combined with others representing absolute moisture content and relative humidity to devise a scheme for the objective prediction of rainfall amounts in Vancouver"--Abstract. Numerical weather forecasting Canada. Temps (Météorologie) Prévision numérique Canada. Canada. Meteorological Branch, issuing body. TEC ; 509. (CaOODSP)9.934253 PDF 819 KB https://publications.gc.ca/collections/collection_2025/eccc/en57/En57-56-509-1964-eng.pdf UDC 551.509.313; 551.511.3