The relationship between specific synoptic and mesoscale snowfall producing system types and their associated mean upper-level flow patterns are examined to determine their impacts on snowfall magnitudes in central Indiana. Chi-square and ANOVA tests are conducted to determine the relationship of the 850mb temperature, the 1000-500mb thickness, 500mb flow pattern, and phase of the Southern Oscillation Index to snowfall amounts for the period of record 1974-2003. Results suggest that variables such as the 1000-500mb thickness, system type, and phase of the Southern Oscillation Index do affect the magnitude of snowfall in central Indiana on a variety of temporal scales ranging from days to entire seasons. / Department of Geography