A strong cold front will move into the Devils Lake Basin Monday morning, then push east into northwest Minnesota by Tuesday morning. Showers and thunderstorms will develop by Monday afternoon in eastern North Dakota, then overspread the rest of western Minnesota Monday evening. Some storms will contain heavy rain that may cause localized flooding in urban and poorly drained areas. Much colder air will filter in behind the cold front, and temperatures will fall 20 to 25 degrees after the frontal passage. Temperatures will fall well below normal on Tuesday, and cool weather will continue through this week.