This is a COMET collaborative research study between the National Weather Service Office in Wakefield and the Virginia State Climatology Office on the University of Virginia campus in Charlottesville. Our research objective is to improve the forecastability of precipitation type duration associated with mid-atlantic cold air damming events. Research includes developing relationships between upper-air parameters and surface precipitation types for stations located across Virginia. The data set includes nearly 100 case studies of mixed precipitation events during the past 35 years. We are constructing forecasting aides in order to more accurately differentiate between a forecast of rain, freezing rain and snow given the available upper-air conditions.

This study began in 1996 and is expected to be completed in 1999.