A cold front will move south into the Philadelphia region on Friday, set up for the weekend, and bring a small chance of light snow on Sunday night.
The combination of colder temperatures and a low pressure system off the North and South Carolina coast will lead to some uncertainty as some weather models suggest the system will stay close to the coastline, while others show it going out to sea, according to the National Weather Service. If it does hang off the coast, light precipitation is possible across the region on Sunday.
And while surface temperatures are looking too warm on Sunday for snow, snow showers could develop Sunday night into Monday, forecasters said.
Meanwhile, temperatures on Wednesday night and Thursday morning look to remain mild for mid-March, in the mid-to-upper 40s. The colder air arrives later on Thursday, bringing a chance of light showers in the afternoon and even isolated thunderstorms and gusty winds in some locations.
High temperatures on Friday should be closer to the season normal.
Here's the 7-day forecast from the weather service:
Wednesday Afternoon
Scattered showers, mainly after 5pm. Mostly cloudy, with a high near 65. East wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Scattered showers and thunderstorms before 8pm, then isolated showers between 8pm and 1am. Partly cloudy, with a low around 47. South wind 5 to 7 mph becoming west in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers between 9am and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 66. Light west wind increasing to 9 to 14 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 43. West wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers after 9am. Partly sunny, with a high near 55. West wind 11 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers before 9pm. Partly cloudy, with a low around 32. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Sunny, with a high near 48.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
A chance of rain after 9am. Partly sunny, with a high near 49. Chance of precipitation is 40%.
Sunday Night
A chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.
Monday
A chance of rain and snow showers. Partly sunny, with a high near 50. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 32.