A slow moderation in temperatures will continue for the remainder of this week, but in spite of this warm up readings will still remain below average for late March. By Saturday night, the northward surge of warm and unstable air will produce showers and a few thunderstorms that will overspread the entire region. However, the wet weather should come to an end early Sunday with the passage of a cold front. The reinforcing shot of cool air in the wake of the front will mean a cool Sunday for late March, with highs in the 50s.   (Please visit http://weather.gov/lsx for more information.)