A significant winter storm is forecast to impact Lake County over the next several days, and the National Weather Service (NWS) has issued a Blizzard Watch for the entire Chicago metropolitan area from Tuesday afternoon through Wednesday afternoon. A blizzard includes both significant snow and very strong winds. While there is still some variance between weather models, the first round of snow is expected tonight into Tuesday morning, with perhaps two to four inches of snow, followed by the much more significant threat of heavy snow from Tuesday afternoon into Wednesday. The snow Tuesday and Wednesday is expected to combine with strong winds and blizzard or near-blizzard conditions, including very low visibility and whiteout conditions. The NWS has also issued a Coastal Flood Warning for the Lake and Cook County shore of Lake Michigan, where the winds will push large waves ashore, leading to beach erosion and possible flooding and subsequent icing of low-lying roads and streets.