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Orographic Enhancement Duluth and North Shore of Lake Superior, December 3, 2013

The radar loop shows heavier snow attached to the higher terrain over Duluth and northeast along the north shore of Lake Superior. A deep layer of east to east-southeast winds from the surface through 700 millibars (roughly between 9500 and 10000 feet) resulted in the enhanced snow.

National Weather Service radar from Duluth, MN, 7:43 AM CST to 9:02 AM CST, December 3, 2013