Map from nationalatlas.gov now called The National Map of the
U.S. Geological Survey's (USGS) National Geospatial Program

Directional convergence can also occur with offshore wind. In this case, wind from the north or north-northeast converges with wind from an east-northeast direction over the lake. Higher elevations on both sides of Lake Superior tend to force the wind into the east-northeast direction. If wind veers with height, turning to come from the east or southeast, snow can be blown inland over Duluth.