PITTSBURGH, Pa. (WPXI) – The National Weather Service has issued a flood warning for several rivers in the area and West Virginia from late Sunday night into Monday evening. The warning specifically names the Monongahela River at Point Marion affecting Greene and Fayette counties; Monongahela River near Charleroi affecting Washington, Fayette and Westmoreland Counties; Monongahela River near Elizabeth affecting Allegheny, Washington and Westmoreland counties. One to three inches of rain is forecast to fall across portions of West Virginia and far Southwest Pennsylvania through Monday morning. The heaviest rain is expected Sunday and Sunday night. This rainfall along with snow melt will result in significant rises on the Cheat and Monongahela rivers.