The Spatial Variations of Mean Annual Snowfall in Western North Carolina

Abstract

Western North Carolina's snowfall can be highly variable. For the purpose of this study, the western North Carolina region is divided into four sub-regions. These sub-regions take into account the geographic characteristics of the region. Daily snowfall amounts from 16 National Weather Service Cooperative Observer Stations are compiled into annual means for a 20-year time period These annual means are then analyzed to identify existing spatial patterns. Geographic characteristics such as elevation, latitude, exposure, as well as other physical and synoptic characteristics of the stations and the sub-regions are considered. Variability within the sub-regions is also analyzed. Results indicate that snowfall variability can vary dramatically between sub-regions. While there are several geographic characteristics that help explain the spatial variations of mean annual snowfall amounts, elevation is the primary one. Typically, snowfall amounts increase at higher elevations. Location and aspect also appear to be important geographic characteristics, depending on the type of weather system. By gaining a better understanding of these spatial variations, the public can potentially be better prepared for this type of weather event.