Gomes, A. M.Held, G.2014-05-272014-05-271992-12-01South African Journal of Science, v. 88, n. 9-10, p. 516-524, 1992.0038-2353http://hdl.handle.net/11449/64330On 27 March 1991, an isolated thunderstorm passed between the two CSIR Doppler radars, spaced about 45km apart. Both radars simultaneously recorded Doppler data of the storm, and a detailed case study during an 11-min period is presented. Air motions synthesized from these data provide the first three-dimensional display of Doppler-derived wind fields within a multicell storm on the Transvaal Highveld. Regions of high divergence values (10 -2s -1) at low levels were found mostly in close proximity to reflectivity maxima (45-51 dBZ), which is consistent with findings from North America, that gravitational loading by the precipitation plays a key role in the initiation and maintenance of downdraughts. -from Authors516-524engDoppler radarthunderstormwind fieldSouth AfricaArtigoAcesso restrito2-s2.0-0027037385