A WIDE COLD-FRONTAL RAINBAND AND ITS RELATIONSHIP TO FRONTAL TOPOGRAPHY

A wide cold-frontal rainband associated with a vigorous surface cold f ront was investigated using conventional meteorological data and the v elocity and reflectivity data from high-resolution Doppler radar. It w as found that the movement of the rainband was closely related to the velocity of the frontal surface, and that the substructural features o f the rainband corresponded closely with the topographical features of that surface. The evolution of the topography of the frontal surface is described, and some processes that might affect frontal topography, and therefore the structure and movement of rainbands, are examined.