Tuesday's weather forecast brings two distinct risks to the Philadelphia region — we've issued a NEXT Weather Alert for excessive heat during the day and chances of storms at night. A heat advisory is in effect from 10 a.m. to 8 p.m. Tuesday. A severe thunderstorm watch is in effect for several Pennsylvania and South Jersey counties and all of Delaware until 9 p.m. @andrewkozaktv #philadelphia #philly #phillyweather #forecast #delaware #southjersey #weatheralert #thunderstormwatch #heatadvisory