By the end of the week, the jet stream branches will merge, forming a strong, well developed storm system.
The temperatures are a major factor in the rain and snow forecast across the Nation this week. The latest forecast is showing heavy snow over Michigan, but heavy rain down to Chicago. If the temperatures change slightly, then we could see heavy snow in Chicago and Milwaukee. Stay tuned to this forecast!
WeatherNation will continue to update this article with the latest forecasts for the end of the week. Check back with us on-air and online for updates on this potential winter storm.