During the time period studied, 653 soundings launched from Buffalo, NY (KBUF) occurred within two hours of measureable snowfall near Buffalo (i.e., within 100-km radius of the sounding location). Of these 653 soundings 297 occurred during a lake-effect snow event, 56 during a lake-enhanced snow event, and 300 during a synoptic-scale snow event. Lake-effect DGZs have bases consistently closest to the surface in each month of the cold season. During the peak months of the cold season (December, January), the DGZ base becomes closer to the surface in all types of snow events. Mean DGZ depth is greatest for lake-enhanced storms especially in the early months of the cold season. DGZ mixing ratio values are smallest in lake-effect storms and largest in synoptic-scale storms. Mixing ratios generally decrease for all storm types during middle of the cold season. Findings related to seasonal variability of DGZ characteristics show potential to aid in operational snowfall forecasting throughout the Great Lakes region and additional research results will be presented.