Extreme heat grips South-Central Pennsylvania through the holiday weekend
NOW, THE ALERT DAY FORECAST FROM THE WGAL NEWS EIGHT STORM TEAM. ANOTHER ALERT DAY TODAY DUE TO THE INTENSE HEAT AND HUMIDITY. YESTERDAY WE HIT 102. I THINK WE COULD DO IT AGAIN TODAY, AND IT’S GOING TO FEEL LIKE IT’S UP TO 110 DEGREES WITH ONLY AN ISOLATED THUNDERSTORM LATER FOR THE FOURTH. STILL FEELING LIKE 100 TO 110. FEW STORMS AROUND IN THE AFTERNOON AND EVENING, BUT SUNDAY IS OUR BEST BET FOR SOME SCATTERED SHOWERS AND THUNDERSTORMS THAT COULD PRODUCE DAMAGING WIND GUSTS, AS WELL AS HEAVY RAIN. IT DOES EASE A LITTLE ON SUNDAY AS FAR AS THE HEAT IS CONCERNED. IT WILL FEEL LIKE THE MID TO UPPER 90S FOR TODAY. THE STORM PREDICTION CENTER HAS HIGHLIGHTED US IN A SLIGHT RISK OF SEVERE WEATHER, BUT LET ME SHOW YOU THE PREDICTOR. I BARELY SEE A THING POPPING UP THIS AFTERNOON OR THIS EVENING. CONDITIONS ARE RIPE FOR THAT STORMS, BUT IT’S JUST TOO HOT TO GET THOSE THUNDERSTORMS TO POP LOCALLY. NOW, I DO THINK THERE WILL BE SOME STORMS TO OUR WEST. MAYBE THEY TRICKLE IN HERE AFTER DARK AND THEN DISSIPATE AROUND MIDNIGHT. 1 A.M. THERE COULD BE AN OVERNIGHT SHOWER, BUT THAT’S ABOUT THE EXTENT OF OUR RAINFALL FOR TODAY. NEWS EIGHT STORM TEAM FORECAST STARTS OUT WITH HAZY SUNSHINE AND WARMING QUICKLY. BY NINE 10:00 WE COULD BE IN THE 90S THIS AFTERNOON. BLAZING HEAT, FEELING LIKE 105 TO 110. JUST LIKE YESTERDAY. AND THEN THIS EVENING, AN ISOLATED STORM. BUT THE CHANCES VERY SLIM. AT 8 P.M. WE’RE STILL WELL INTO THE 90S NOW. THE RECORD WARM LOW IS 78. WE COULD TIE THAT RECORD IN HARRISBURG. AND TOMORROW, MOSTLY SUNNY, FEELING LIKE THE TRIPLE DIGITS. FEW STORMS IN THE AFTERNOON AND EVENING, BUT AGAIN, THE CHANCE IS PRETTY SLIM. 96 TO 100 FOR TOMORROW’S HIGHS ON THE FOURTH. HERE’S YOUR TEMPERATURES. RIGHT NOW IT’S NEAR 80 DEGREES IN LEWISTOWN. IT IS 80 DEGREES IN HARRISBURG AND GETTYSBURG. SAME FOR LEBANON. WE HAVE 78 IN LANCASTER AND 75 IN YORK. COUPLE THAT WITH THESE DEW POINTS THAT FEEL TROPICAL IN THE 70S, AND YOU REALLY GET THAT OPPRESSIVE HEAVY HEAT. THAT’S WHAT WE’RE GOING TO HAVE AGAIN TODAY. NOTICE THE UV INDEX. IT IS VERY HIGH WITH A BURN TIME OF 15 MINUTES. AND OUR AIR QUALITY POOR FOR OZONE. SO WE HAVE AN AIR QUALITY ALERT ISSUED TODAY FOR THE COUNTIES IN ORANGE FOR HIGHER THAN USUAL OZONE CONCENTRATION. HERE’S OUR STORM TEAM LIVE RADAR NETWORK. AND IT IS DRY AS A BONE UNFORTUNATELY. WISH WE COULD MUSTER UP SOME RAIN, BUT THE CHANCE TODAY VERY SLIM BECAUSE THAT DOME OF HEAT IS RIGHT ON TOP OF PENNSYLVANIA. SO TODAY THE BIG BLUE H HIGH PRESSURE. IT’S BEEN MAKING US SWEAT. THAT’S STILL RULES OUR FORECAST. THERE COULD BE SOME STORMS TO OUR NORTH, TO OUR SOUTH, TO THE WEST. BUT IN THE SUSQUEHANNA VALLEY, NOT MUCH GOING ON UNTIL TONIGHT WHERE WE COULD HAVE AN ISOLATED SHOWER OR STORM. NOW, TOMORROW, LOOK AT THIS. THE STORM PREDICTION CENTER AGAIN PUTS US IN A SLIGHT RISK OF SEVERE WEATHER. WATCH ON THE PREDICTOR. THERE’S A BOUNDARY ACROSS NORTHERN PENNSYLVANIA. YOU SEE SOME SCATTERED ACTIVITY THERE, BUT VERY LITTLE GOING ON IN THE SUSQUEHANNA VALLEY. THERE’S A CHANCE FOR A FEW AFTERNOON EVENING STORMS. THERE COULD BE A SHOWER OR THUNDERSTORM AROUND DURING FIREWORKS, BUT I DON’T THINK THE CHANCE IS WIDESPREAD. NOW, AS WE ROLL INTO SUNDAY, WATCH, THIS BOUNDARY SITS OVERHEAD, GIVING US A GOOD CHANCE OF SCATTERED SHOWERS AND STORMS SUNDAY AFTERNOON. SO THAT’S WHEN WE’RE GOING TO BE WATCHING OUT FOR STORMS THAT COULD PRODUCE DAMAGING WIND GUSTS AS WELL AS HEAVY RAIN. WE ARE OUTLOOK OVER THE NEXT THREE DAYS, BUT I DO THINK SUNDAY IS OUR BEST BET. HERE’S THE TEN DAY FORECAST 84 DEGREES. WOW. WHERE DID THAT COME FROM ON MONDAY AND TUESDAY? THAT’S GOING TO FEEL GREAT. IT DOES COME WITH A CHANCE FOR A FEW SHOWERS AND THUNDERSTORMS AND LOWER HUMIDITY. WEDNESDAY. THURSDAY. LOOKING MAINLY DRY EVEN FRIDAY. THEN THE CHANCE OF A FEW SCATTERED SHOWERS AND STORMS RETURN FOR THE
Extreme heat grips South-Central Pennsylvania through the holiday weekend
Updated: 8:43 AM EDT Jul 3, 2026
An Extreme Heat Warning is in effect for South-Central Pennsylvania, with dangerous triple-digit temperatures and tropical humidity making it feel like 105 to 110 degrees through today and into Saturday in some counties.Heat alerts and timingEntire Susquehanna Valley: Extreme Heat Warning until 8 p.m. todayLancaster, York, Adams, Dauphin and Lebanon counties: Extreme Heat Warning extended until 8 p.m. SaturdayFranklin, Mifflin, Juniata, Perry and Cumberland counties: Heat Advisory from 8 p.m. Friday to 8 p.m. SaturdayFriday’s forecastHighs will surge into the low 100sIf temperatures hit 102 degrees, it would be the first back-to-back 102-degree days since July 5-6, 1999Feels-like temperatures: 105 to 110 degreesIsolated thunderstorms are possible from 3 p.m. to 10 p.m., with a slim chance of damaging wind gustsTonightLows will only drop into the upper 70sMostly clear skiesThe record warmest low is 78 degrees, set in 1999A stray thunderstorm can’t be ruled outIndependence Day outlookStill very hot, with highs in the upper 90sHeat index: 100 to 110 degreesA few afternoon and evening storms are possible, bringing brief heavy rain and damaging wind gustsStorms should weaken in time for fireworksAround 10 p.m., temperatures should be near 86 degreesSunday trendScattered storms remain possibleHighs near 92 degreesHumidity stays high, but the worst of the oppressive heat easesFeels-like temperatures: 94 to 98 degrees
An Extreme Heat Warning is in effect for South-Central Pennsylvania, with dangerous triple-digit temperatures and tropical humidity making it feel like 105 to 110 degrees through today and into Saturday in some counties.
Heat alerts and timing
Entire Susquehanna Valley: Extreme Heat Warning until 8 p.m. todayLancaster, York, Adams, Dauphin and Lebanon counties: Extreme Heat Warning extended until 8 p.m. SaturdayFranklin, Mifflin, Juniata, Perry and Cumberland counties: Heat Advisory from 8 p.m. Friday to 8 p.m. Saturday
Friday’s forecast
Highs will surge into the low 100sIf temperatures hit 102 degrees, it would be the first back-to-back 102-degree days since July 5-6, 1999Feels-like temperatures: 105 to 110 degreesIsolated thunderstorms are possible from 3 p.m. to 10 p.m., with a slim chance of damaging wind gusts
TonightLows will only drop into the upper 70sMostly clear skiesThe record warmest low is 78 degrees, set in 1999A stray thunderstorm can’t be ruled outIndependence Day outlookStill very hot, with highs in the upper 90sHeat index: 100 to 110 degreesA few afternoon and evening storms are possible, bringing brief heavy rain and damaging wind gustsStorms should weaken in time for fireworksAround 10 p.m., temperatures should be near 86 degrees
Sunday trendScattered storms remain possibleHighs near 92 degreesHumidity stays high, but the worst of the oppressive heat easesFeels-like temperatures: 94 to 98 degrees