Rain–Snow Boundaries over Southern Ontario

Abstract

Abstract Rain–snow boundaries in two southern Ontario storms are examined. Radar and satellite information were used to illustrate the nature and extent of the associated precipitation and cloud regions. The deepest radar echoes and clouds occurred close to the boundary. Surface temperature and pressure were related to the boundary; some of the changes in these parameters were shown to be attributable to melting snowflakes. These radar, satellite, and surface observations are consistent with a mesoscale circulation driven by melting snow.