PHILADELPHIA (WPVI) —
It was a sunny, seasonably cool day, with a high of 47. But changes are on the way! The old frontal boundary that passed through here midweek is stalled off the eastern seaboard and lingers all the way down into Florida and the Gulf Of Mexico. An area of low pressure will develop along this boundary tomorrow and begin lifting northeastward. The low will remain well offshore, but just enough moisture will get thrown back into the Southeast and Mid Atlantic to give us a brush of precipitation in the form of snow on Saturday.
TONIGHT: It’s partly cloudy, brisk and chilly. The low drops to 34 in Center City, 27 in our colder suburbs.
FRIDAY: We may see a break or two of sun very early, but mid and upper level clouds fill in fast giving us a mainly cloudy and chilly day. With a solid deck of clouds, the the low sun angle and limited hours of daylight, our high only hits 39.
SATURDAY: As we head toward the predawn hours, precipitation in the form of snow will spread northward into our southern areas and then reach the I-95 corridor around sunrise. This will then advance by late morning to reach its farthest west extent in western Chester, NW Bucks & NW Montgomery Counties. A light snow will then last much of the day, but temps will be above freezing, 36 in Philadelphia. So roadways, which have been warm recently, should be mainly just wet. But be careful Saturday night as any untreated surfaces could ice over. Grassy accumulations of a coating to 1″ are possible for the I-95 metro area (roughly 20 miles on either side of I-95). Then when you get into Central Delaware and southeastern NJ you will find a band of 1″ to 2″ with an isolated 3″ not out of the question. This should be just enough snow to get everyone in a festive spirit for the holidays, but not cause any big issues.
SUNDAY: The coastal storm has lifted out, but a gusty west wind will fill in behind it. Under a partly sunny sky we are looking at wind gusts of 30 to 35MPH with a high of 39. Wind chills will be stuck in the 20s all day.
MONDAY: Expect mostly sunny skies and a chilly high of 43.
TUESDAY: It turns cloudy with some snow showers as another cold front swings through. We expect a high of 42.
WEDNESDAY: A blast of Arctic air arrives with some sunshine. The high dips to 32.
(Copyright ©2017 WPVI-TV. All Rights Reserved.)