Big Cool Down Expected For PA: How Long Will It Last?

EASTERN PENNSYLVANIA — The "nicest day" so far in 2024 will be Thursday, according to weather experts. But don't expect the perfect temperatures and vibrant sunshine to last very long, the forecast suggests.

According to the National Weather Service, an approaching cold front will bring "unsettled weather to the area" with temperatures cooling off this weekend and into next week.

Unseasonably warm temps in place to close out the work week. Records will be safe, but Thursday will be the nicest day of 2024 (so far). An approaching cold front will bring unsettled weather to the area as well, then cooling off this weekend and start of the new work week. pic.twitter.com/ItfwDKZgKo
— NWS Mount Holly (@NWS_MountHolly) March 13, 2024

Why is the temperature dipping?

The Weather Channel reports the jet stream will flip this weekend, causing the cool down.

Low temperatures will be cold enough to bring frost and freeze conditions all the way into the South early next week, The Weather Channel predicts.

How cold will it get?

High temperatures in the Philadelphia area will remain in the 60s for the weekend. However, the high temperature expected by Tuesday will be in the 40s. By late next week, daytime temperatures will swing back up to the mid-50s.

Low temperatures will be in the 30s starting Sunday and through the week.

How long will the cool down last?

"Longer-range models suggest this cooler East pattern could hold through the first part of next week. After a brief warm-up in the nation's mid-section around mid-week, another shot of cool air could plunge out of Canada late next week and spill east and south through Palm Sunday weekend," according to The Weather Channel.

RELATED: Spring 2024 Forecast For PA: See When Temperatures Will Rise

Here's the current forecast:

Tonight: A chance of showers, mainly after 5am. Increasing clouds, with a low around 56. South wind 5 to 10 mph. Chance of precipitation is 30%.

Friday: A chance of showers before 8am, then rain likely, mainly after 5pm. Mostly cloudy, with a high near 72. Southwest wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night: Rain likely, mainly before 8pm. Mostly cloudy, with a low around 45. North wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday: Sunny, with a high near 62. North wind 5 to 10 mph becoming west in the afternoon.

Saturday Night: Partly cloudy, with a low around 46.

Sunday: Mostly sunny, with a high near 60.

Sunday Night: Partly cloudy, with a low around 39.

Monday: Mostly sunny, with a high near 49.

Monday Night: Mostly clear, with a low around 32.

Tuesday: Mostly sunny, with a high near 46.