Abstract
A typical pattern (revealed by radar) of precipitation along a cold front includes both showers containing many nearly vertical cells, and continuous rain characterized by uniformity below the freezing level and the "bright band" of melting snow at that level. Observations in vertical section were made by scanning at angles of elevation up to 30°. At wave length 3 cm., observations of this sort reveal some of the snow above the bright band, and its trailing pattern. At 10.7 cm., little is seen of the snow, but transient echoes with duration of the order of one second are observed, attributable to lightning. These echoes have not been detected when scanning in the vertical at wave length 3.2 cm., although others have reported something of the sort at 3.2 cm. when different observing techniques were used. The transient echoes occur outside, but close to, regions of rain; most frequently about one mile from the top of a shower cell. It is probable, combining 3.2 cm. observations of snow on one occasion with 10.7 cm. observations of the transients on another occasion, that the transients occur in regions not only near rain, but at the same time in or near a region filled with snow.