Radar Observation of Cold Front Thunderstorms of July 14, 1956

摘要

On July 14 1956 a squall line of intense thunderstorms developing principally in New England before a fast-moving cold front in a conditionally unstable atmosphere, produced severs weather at the surface. It is shown that orographic features were associated with the initial radar echo appearances of the storms. Intensification of the echoes as observed by CPS-9 radar was found to be associated with their combination, passage over specific geographic areas and their abrupt change of course. A qualitative relationship is shown to exist between radar intensification and severe weather at the surface. A negative correlation between echo speed and intensity and a positive correlation between echo speed and height were found to exist.