Vertically pointing airborne Doppler radar observations of Kelvin-Helmholtz billows

Abstract

Atrain of Kelvin-Helmholtz billows in a deep stratiform cloud over a mountain range is documented using data from a high-resolution vertically pointing airborne Doppler radar. The billows had a spacing of 2-2.5 km and a small aspect ratio. The formation and decay of the billows appear to be related to flow acceleration over a mountain. © 2010 American Meteorological Society.