ZntroductionThe field of radar meteorology had its beginning during the early part of World War 11. Since that time, a large amount of fruitful reharch has been accomplished. Although all of the results in this paper have been published in widely disseminated geophysical journals, a great deal still has not been brought to the attention of those outside the 5eld of met~&qgy. In writing this paper, the author has tried 40 keep in mind the nooradar meteorologist, with the hope that it may act as a stimulus for future radar weather research by scientists in related fields.The prime function of the radar, as used in the field of rneteardogy, is in locating and identifyiig weather phenomena, with probably mom Maideration and effort given to weather of a destructive nature, i.e.+ thundimtonns, their offsprings such as hailstorms and tornadoes, and hurricanes. The reason is that where and when radar information is available, it is usual reliable source of data on which to base severe storm advisories to the public.The description of weather patterns as viewed on the various radar scopes to be discussed will generally be of a qualitative nature, althwgh quantitative data can often be obtained from the radar scopes and subsequeatk used to provide considerable information on the dynamics of the meteorological processes.
Convective PrecipitationConvective precipitation may be classed as showers or thundemtorms, depending upon whether lightning is occurring at the time of the observation.The echo-tops of showers as viewed on the standard scope are considerably lower than the tops of thunderstorms, and thunderstorms generally have greater dimensions in the horizontal plane as well as the vertical. Scattered thunderstorms appear as randomly distributed discrete echoes; but in many instances they tend to form organized clusters or lines. Radar reflectivity gradients are characteristically very large, with echo diameters varying from as small as a mile to as large as tens of miles. FIGURE 1 is an example of the 171 172 Annals New York Academy of Sciences