Winter storm warnings are in effect for the entire state of Delaware, as well as portions of southeast Pennsylvania and South Jersey.

Columbia Public Schools will be closed Monday because of winter weather. Instead, the district will have an AMI, or alternative methods of instruction, day. "AMI allows all Public Schools students to be engaged in learning on inclement weather days when conditions prevent school from being in session,

Several Baltimore area school districts and other entities announced closings because of the impending winter snowstorm.