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John D. Stackpole

Abstract

Numerical methods of calculating the pseudo-adiabatic characteristics of saturated air parcels are presented, based on the Rossby definition of the pseudo-equivalent potential temperature. With these methods it is then possible to perform routine automatic analysis of soundings. As examples, techniques for determining the lifted condensation level, the level of free convection, and the convective condensation level are presented.

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FREDERICK G. SHUMAN and JOHN D. STACKPOLE

Abstract

Numerical experimentation with various finite difference formulations of a particular set of differential equations incorporating a map scale factor indicates that the stability of the calculations is as dependent upon the manner in which the map factor is introduced as the form in which the dynamic terms of the equations are written.

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Ralph A. Petersen and John D. Stackpole

Abstract

An overview of the regularly scheduled sequence of computer analyses and forecasts produced at the National Meteorological Center (NMC) is presented. The available computer resources and time schedule constraints are discussed, the sources and treatment of incoming data are described, the purposes and configurations of the operational analysis/forecasting systems are outlined, and the mechanisms for product distribution are presented.

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