MINNEAPOLIS — The average dates for first accumulating snow are right around the corner across the Midwest. This year, however, some areas may see their first measurable snow later than usual. Much of the region that normally sees snow in early November is trending toward mid-November instead. For areas farther south, much will depend on what happens with the weakening polar vortex.
October Snow Usually Comes First Near Lake Superior
The earliest average first snow falls along the Lake Superior shoreline, usually in October. That includes areas near Duluth, International Falls, and Marquette. The Black Hills near Rapid City also tend to see snow in October because of their higher elevation.
Lake-effect snow helps these areas get their first flakes early. Cold air moving over the warm lake water can create snow bands quickly. Higher terrain also cools faster, which helps snow stick sooner.
Early November Normally for Minnesota and the Dakotas
Much of North Dakota, South Dakota, and Minnesota usually sees its first accumulating snow in early November. That includes Bismarck, Fargo, Grand Forks, Aberdeen, and Pierre. Minneapolis, St. Paul, and St. Cloud also fall in this zone.
Northern Wisconsin and much of northern Michigan are in the same range. Cities like Wausau, Eau Claire, Green Bay, Traverse City, and Sault Ste. Marie usually see snow around this time. This year, many of these areas are trending toward mid-November instead.
Mid-November for Iowa and Southern Wisconsin
The mid-November zone covers much of Iowa, southern Minnesota, and southern Wisconsin. That includes Sioux Falls, Sioux City, Rochester, and Waterloo. Madison, Milwaukee, Rockford, and Grand Rapids also usually see first snow around this time…