Abstract: The performance of the NMC Global Medium-Range Model in forecasting the March 1993 ?superstorm? at various lead times is assessed. The forecasts of mean sea level pressure, 1000?500-mb thickness, 500-mb geopotential height ...

Abstract: By use of the time-dependent diffusion equation it is shown that a heat-balance equation for an evaporating raindrop based on the ?quasi-stationary? assumption (?//t = 0) is accurate. This equation is then used to obtain ...

Abstract: The feasibility of a dynamical model for forecasting the development and dissipation of fog and stratus is studied. Several simple models based on numerical solutions of the diffusion equation are developed and tested. The ...

Abstract: The operational model used to generate medium-range forecasts at the National Meteorological Center (NMC) has undergone significant changes in the last few years, resulting in considerable improvement in the skill of its ...

Abstract: Recent changes in the operational National Centers for Environmental Prediction (formerly the National Meteorological Center) global analysis?forecast system are described. The most significant analysis change was the ...