COMPARISON OF DOPPLER AND NUMERICAL MODEL DATA OF AN OKLAHOMA SQUALL LINE.

During the past decade Doppler radars and three-dimensional numerical models have been used to provide data on the structure and evolution of severe storms. The primary storms of interest have been those that possess quasi-steady characteristics (e. g. , supercells) and those that evolve by discrete new developments (e. g. , multicells). Both quasi-steady and discrete evolution have also been noted for individual storms that compose squall lines. A Doppler analysis of one such line (occurring on 19 May 1977 in Oklahoma) during its mature stage was previously presented. The results were then compared with a two-dimensional numerical storm model. Some similar features appeared, including the westward tilt of the updrafts and new updrafts forming ahead of old ones. Refs.