Hour-by-hour snow, freezing rain, rain projections for South-Central Pennsylvania
BREEZE ACROSS THE AREA. NOW YOU CAN SEE THE FLAGS WAVING ON THE HERSHEY SKY CAM. BUT I’LL TELL YOU WHAT WE DO HAVE CLEAR SKIES, SO IT’S NICE TO SEE THE SUNSHINE EARLIER TODAY. NOW SEEING SOME CLEAR SKIES DEVELOPING OVER THE AREA. ALL THANKS TO HIGH PRESSURE THAT’S BUILDING IN FROM THE WEST. WE’RE SITTING RIGHT AROUND 36 DEGREES, BUT WITH THAT NORTHWESTERLY 15 MILE PER HOUR BREEZE MAKES IT FEEL A LITTLE CHILLIER OUT THERE. BUT IT WILL BE A QUIET START TO THE WEEK WITH PLENTY OF SUNSHINE EARLY. THEN WE’LL START TO INCREASE THE CLOUD COVER FOR MONDAY AFTERNOON AND THE EVENING. AND ONCE WE GET INTO OVERNIGHT MONDAY INTO TUESDAY, WE’RE WATCHING THIS QUICK MOVING SYSTEM THAT’S GOING TO COME IN WITH SOME POSSIBLE LIGHT SNOW TO A WINTRY MIX OVERNIGHT INTO TUESDAY MORNING. WE DID MAKE AN IMPACT FROM OVERNIGHT MONDAY INTO TUESDAY. WE’RE GOING TO CHAT ABOUT THAT HERE IN JUST A FEW MINUTES, BUT WE’LL SEE SOME MORE RAIN CHANCES FOR THE END OF THE WORK WEEK. OR I SHOULD SAY THE HOLIDAY WEEK WITH A FEW SHOWERS FOR CHRISTMAS DAY, AND THEN MORE FOR YOUR FRIDAY AND THEN TURNING MILDER AS WE, ESPECIALLY AS WE GET INTO FRIDAY. WE’LL BE RIGHT AROUND THAT 50 DEGREE MARK THIS EVENING. MOSTLY CLEAR. STILL A LITTLE BIT BREEZY, BUT THEN THE WINDS WILL SUBSIDE. THEY’LL RELAX FOR OVERNIGHT TONIGHT. REMAINING MAINLY CLEAR. STILL COLD INTO THE 20S. WE’LL GO DOWN TOWARDS THE LOWER 20S WITH THE NORTHWESTERLY 5 TO 10 MILE PER HOUR BREEZE. THEN FOR TOMORROW WE’LL START WITH SOME EARLY SUNSHINE, THEN FOR THE AFTERNOON, DEVELOPING THAT CLOUD COVER WITH LIGHT WINDS OUT OF THE SOUTH 36 TO 40 DEGREES. SO THE BRIGHT NIGHTS FOR FOR WELLSPAN PARK. IT ALREADY STARTED AT 5:00. BUT FOR THE REST OF YOUR FORECAST FOR THIS EVENING, GETTING INTO CLOSER TO 7:00 9:00 FOR TONIGHT REMAINING MAINLY CLEAR, BUT WE STILL HAVE THAT BREEZE STICKING AROUND. WANT TO MAKE SURE YOU HAVE THAT THAT EXTRA JACKET WITH YOU TO ACCOUNT FOR THE FEELS LIKE TEMPERATURES, THE WIND CHILLS. SO STATS FOR THE DAY TODAY FOR HARRISBURG INTERNATIONAL AIRPORT HIT A HIGH OF 44 DEGREES, BUT THAT’S RIGHT AROUND PAR FOR THIS TIME OF YEAR. 42 IS WHAT WE EXPECT FOR FOR THIS TIME, FOR THIS TIME IN DECEMBER. ALSO FOR LOWS EARLIER THIS MORNING RIGHT AROUND 24 DEGREES. SO NOTHING TOO MUCH TO WRITE HOME ABOUT. RIGHT AROUND PAR FOR THAT FOR FOR TEMPERATURES TODAY. IN TERMS OF AND SPEAKING OF TEMPERATURES, WE’RE INTO THE 30S RIGHT NOW. WE’RE 35 IN YORK, 36 IN CARLISLE, 32 LEWISTOWN, 37 IN CHAMBERSBURG. BUT WE STILL HAVE THAT BREEZE COMING OUT OF THE NORTHWEST THAT MAKES THAT’S WHAT MAKES IT FEEL LIKE THE 20S. AND IN MOST AREAS YOU CAN SEE 25 IN LANCASTER, 28 IN LEBANON, STILL AROUND 27 DEGREES. IT FEELS LIKE IN HARRISBURG, FEELS LIKE 21. IN SELINSGROVE. STORM TEAM, LIVE RADAR NETWORK. ALL THANKS TO HIGH PRESSURE. LIKE I MENTIONED, THAT’S WHAT’S HELPING TO CLEAR OUR SKIES AND WILL REMAIN MAINLY CLEAR AS WE GET INTO OVERNIGHT. TONIGHT THROUGH TOMORROW, WE’LL START THE DAY OFF WITH SOME MOSTLY SUNNY CONDITIONS. ONCE WE GET INTO THE EVENING. CLOSER TO 6 OR 7:00 IN THE EVENING. HERE COMES SOME OF THOSE CLOUDS AND ALSO THE CHANCE. HERE COMES A LITTLE BIT OF A BAND OF SOME SNOW SHOWERS, POSSIBLY AS WE GET INTO OUR MONDAY, AND THEN ALSO GETTING INTO OVERNIGHT MONDAY INTO TUESDAY. SO LET’S CHAT ABOUT THIS. SO THIS IS OUR THIS IS PREDICTOR MODEL. THIS IS SPECIFICALLY THE GRAPH MODEL IS WHAT WE LIKE IS WHAT IT’S FORMALLY CALLED. OTHER MODELS ARE SUGGESTING THAT WE COULD BE GETTING A POSSIBLE LIGHT SNOW OR MIX. THIS IS SPECIFICALLY THE GFS MODEL THAT WE’RE SEEING. THE EUROPEAN MODEL IS SHOWING THAT WE COULD SEE JUST A LITTLE BIT OF A MIX, AND THEN IT DRIES UP. SO RIGHT NOW THERE’S A GOOD BIT OF FORECAST CHALLENGES. AND THE REASON WHY WE’RE SEEING A SPREAD IN THE MODEL DATA IS BECAUSE THERE’S NOT A LOT OF THERE’S NOT A WHOLE LOT OF MOISTURE TO BE WORKING WITH FOR THIS SYSTEM. SO WHAT WE’RE WHAT WE’RE TRYING TO WATCH FOR IS TO SEE HOW MUCH MOISTURE ENDS UP DEVELOPING IN SOME OF THESE MODEL RUNS, AND THEN SEEING HOW THE TEMPERATURES BEHAVE, BECAUSE THE BOARD, WE HAVE BORDERLINE TEMPERATURES RIGHT AROUND THAT FREEZING MARK. SO IF WE’RE RIGHT AROUND THAT FREEZING MARK, WE COULD GET BOTH RAIN AND SLEET AND THEN ALSO SNOW. SO WE ARE CONFIDENT THAT WE COULD BE SEEING A WINTRY MIX AS WE HEAD INTO OVERNIGHT MONDAY AND EARLY TUESDAY, BUT THEN THAT WOULD ALSO PROMPT AN IMPACT PERIOD WITH THAT POSSIBLE LIGHT SNOW TO A WINTRY MIX. AND BECAUSE THERE’S NOT A LOT OF MOISTURE, THAT’S STILL A CHALLENGE RIGHT NOW. BUT THERE COULD BE A SLOW MORNING COMMUTE FOR YOUR TUESDAY. NOW, IN TERMS OF THE TEN DAY FORECAST, YOU SAW THAT GETTING INTO THE 50S. AS WE END THE WEEK, AS WE GET CLOSER TO FRIDAY, CHRISTMAS DAY, WE ARE LOOKING AT SOME SCATTERED SHOWER CHANCES, LOOKING AHEAD TO NE
Hour-by-hour snow, freezing rain, rain projections for South-Central Pennsylvania
Updated: 7:39 PM EST Dec 21, 2025
The WGAL News 8 Storm Team is tracking a system that could bring a wintry mix to South-Central Pennsylvania Monday into Tuesday.The video above shows the hour-by-hour snow, freezing rain and rain projections.FORECAST CHALLENGE | Marginal temperatures and limited moisture make exact timing and impacts uncertain.Hour-by-hour precipitation projectionLate Monday evening: Clouds thicken ahead of a warm front (little to no precipitation at first).Overnight (late Monday–pre-dawn Tuesday): Light snow develops; temps near 32°F.Early Tuesday morning (commute hours): Snow → freezing rain mix → rain as temps rise to at/above 32°F.Late Tuesday: Precipitation ends, clouds linger; temps climb into the low 40s.ImpactsLight snow totals are expected, but a brief freezing-rain window could create slick/icy spots, especially on bridges and untreated roads. Timing may shift due to marginal temps and limited moisture.Stay weather aware with WGAL’s online toolsRADAR: Track severe weather with WGAL’s interactive radar.LOCATION-BASED ALERTS: Instructions for activating our customized weather alerts are here.CLOSINGS: When severe weather strikes, see if businesses, churches or organizations have closed or delayed.ROAD CLOSURES: Our interactive traffic map is always updated with crashes, construction and road closures. It even has a weather radar overlay.EMAIL ALERTS: We’ll send you daily updates, or just alerts when severe weather is headed your way.HOUR-BY-HOUR: See what you can expect every day with the hourly forecast.WEEKEND WEATHER: Know what to expect before you make your plans.10-DAY FORECAST: Check WGAL’s extended forecast here.
The WGAL News 8 Storm Team is tracking a system that could bring a wintry mix to South-Central Pennsylvania Monday into Tuesday.
The video above shows the hour-by-hour snow, freezing rain and rain projections.
FORECAST CHALLENGE | Marginal temperatures and limited moisture make exact timing and impacts uncertain.
Hour-by-hour precipitation projectionLate Monday evening: Clouds thicken ahead of a warm front (little to no precipitation at first).Overnight (late Monday–pre-dawn Tuesday): Light snow develops; temps near 32°F.Early Tuesday morning (commute hours): Snow → freezing rain mix → rain as temps rise to at/above 32°F.Late Tuesday: Precipitation ends, clouds linger; temps climb into the low 40s.Impacts
Light snow totals are expected, but a brief freezing-rain window could create slick/icy spots, especially on bridges and untreated roads. Timing may shift due to marginal temps and limited moisture.