Showing papers on "Nowcasting published in 1985"
Journal Article•
TL;DR: In this paper, an overview of some conceptual models that are useful for nowcasting is given, which represent a variety of systems associated with midlatitude cyclones and also mesoscale convective systems in the tropics and midlatitudes.
Abstract: Imagery from radars and satellites is one of the main ingredients of nowcasting. When used to provide very detailed forecasts of precipitation for a few hours ahead, the imagery needs to be interpreted carefully in terms of synoptic and mesoscale phenomena and their mechanisms. This paper gives an overview of some conceptual models that are useful for this purpose. The models represent a variety of systems associated with midlatitude cyclones and also mesoscale convective systems in the tropics and midlatitudes. Specific phenomena discussed are warm conveyor belts, including those with rearward- and forward-sloping ascent in ana and kata cold frontal situations, respectively; cold conveyor belts ahead of warm fronts; narrow rainbands associated with line convection at the boundary of a pre-cold-frontal low-level jet; wide mesoscale rainbands associated with midtropospheric convection; squall lines in the tropics and midlatitudes; nonsquall mesoscale convective systems in the tropics and midlatitu...
210 citations
01 Mar 1985
TL;DR: In this article, a new method is introduced which allows an estimate of the movement of synoptic systems and of the scale vertical motion in a quite easy manner and without much expense, and the field of motion is divided into a quasi-stationary drift-or steering field and into the residual field of relative motion.
Abstract: A new method is introduced which allows an estimate of the movement of synoptic systems and of the synoptic scale vertical motion in a quite easy manner and without much expense For this purpose the field of motion is divided into a quasi-stationary drift- or steering field and into the residual field of relative motion, which latter yields a more vivid picture of the motion associated with travelling disturbances on the synoptic scale With the aid of some examples the use of the method for the purpose of nowcasting and for a better interpretation of the products of numerical weather forecasts is demonstrated