Elevated Convection Over Northwest California

摘要

A weakening frontal boundary moved through the coastal waters of Eureka, California on the evening of 10 October 2005. Weak convection developed over the coastal waters and continued a track into the WFO Eureka CWA. Thunderstorms generated over the coastal waters typically weaken as they migrate towards the coast. This weakening of convection results from the more stable lapse rates driven by the cooler sea surface temperatures associated with cold upwelling along the coast. This paper will investigate that in this case elevated convection was primarily triggered by dynamic forcing in the mid and upper levels and sustained by mid level instability.