In this paper we present observations of the secondary flow patterns in the planetary boundary layer by using a dual-Doppler radar system with snow as an air motion tracer. The results show definite patterns of flows, with scale sizes, and the distribution of energy consistent with a secondary flow model of Brown (1970). The sense of rotation is different, but this may be due to the lack of a wind speed high enough to obtain a fully developed secondary flow. The Doppler-derived turbulent dissipation rate shows an initial decrease with height followed by an increase in an elevated shear layer.