A large upper level low pressure system, seen in the water vapor satellite image below, will remain near the Ohio Valley for most of the week. This type of system usually brings cooler temperatures as well as some chances for light rain showers. At the surface, low pressure, indicated over the mid Atlantic coast in the image below will bring steady northerly winds today and Tuesday. High temperatures Monday and Tuesday likely will stay in the 50s, though a few spots may just get into the low 60s Tuesday. These readings will be some 15-20 degrees below normal for mid May. Low temperatures will be in the 40s through Tuesday night. At this time, tonight looks to be the coldest, with temperatures falling into the lower 40s, as shown in the second image below.