PHILADELPHIA - Clouds and sun were the order for Monday, with temperatures in the 80s, setting the Delaware Valley up for potential severe weather Monday night, as a cold front moving in confronts warm, southerly air.FOX 29’s Kathy Orr says a Severe Thunderstorm Watch has been issued for most of the Delaware Valley Monday night.The storms should begin to pop-up in the Philadelphia suburbs of Pennsylvania and the I95 corridor after 9 p.m., with the storms hitting New Jersey after midnight.