Kathy Vetter It's almost time for North Texans to break out the umbrellas again, but this time a small boat might also be a useful accessory.After rising temperatures overnight, another cold front is scheduled to arrive in Dallas-Fort Worth on Thursday, bringing the possibility of as much as four inches of rain in some areas from Thursday afternoon through Friday night, the National Weather Service said Wednesday afternoon.The chance of rain is 60 percent Thursday, with most of the showers and thunderstorms coming after 1 p.m.