A radar wind profiler was used in the RASS mode to obtain remote measurements of the vertical flux of momentum. Time series of half-hour averaged values of the momentum flux are presented as well as profiles of multiple-hour averages recorded on convective summer days. The gross structure of the diurnal variation is in agreement with the expected behaviour of a convective boundary layer. https://www.spidertattooz.com/Industrie-Rohrventilator-mit-Wandmontageplatte-o-160-mm/