Orography has a dramatic influence on lake-effect snowstorms, not only in regions with major mountain barriers such as the Great Salt Lake Basin of northern Utah, but also in the eastern United States and Canada where more modest relief is found around the Great Lakes. For example, over the Tug Hill Plateau of northern New York, which lies downstream of Lake Ontario, annual snowfall increases 25-50 mm for every 100 m rise in elevation and storm-total accumulations have reached 360 cm in extreme lake-effect events.