720 ABUS30 KPHL 190231 RRA SWSPA STATE WEATHER SUMMARY FOR PENNSYLVANIA NATIONAL WEATHER SERVICE STATE COLLEGE PA 1030 PM EDT THU JUL 18 2002 ...AN EXCESSIVE HEAT WARNING HAS BEEN POSTED FOR FRIDAY IN THE SOUTHEASTERN CORNER OF PENNSYLVANIA... A COLD FRONT NEAR NORTHERN PENNSYLVANIA LATE THURSDAY WILL CONTINUE TO MOVE SLOWLY SOUTHWARD KEEPING A CHANCE OF SHOWERS AND THUNDERSTORMS OVER THE STATE. PATCHY DENSE FOG WILL FORM OVERNIGHT ACROSS CENTRAL AND NORTHEAST PENNSYLVANIA. SHOWERS WILL END FRIDAY AFTERNOON IN THE NORTH AND AFTER MIDNIGHT IN SOUTHERN PENNSYLVANIA. IT WILL REMAIN VERY WARM AND HUMID AHEAD OF THE FRONT. THE HEAT INDEX VALUE WILL NEAR 100 DEGREES FRIDAY IN PHILADELPHIA AND SURROUNDING COMMUNITIES. THE LOW TEMPERATURE OVERNIGHT WILL RANGE FROM THE MID 60S IN THE NORTH TO THE MID AND UPPER 70S NEAR PHILADELPHIA. THE HIGH TEMPERATURE FRIDAY WILL RANGE FROM AROUND 80 DEGREES NEAR THE LAKE ERIE SHORE TO THE LOWER 90S IN THE SOUTHEASTERN PIEDMONT. $$ MACH