Now in the midst of this storm, rain will persist off and on for the next few hours before the second phase of the nor'easter swings through, giving us that threat of accumulating snow. Winds will also be picking up. Winter Storm Warnings are posted for counties north of Philadelphia and Winter Weather Advisories for Philadelphia and south. Bottom line, it you don't have to be out, stay home tonight and go out tomorrow night.
Some breaks in the rain are possible along the I-95 corridor and even breaks in the cloud deck are possible in the outer parts of Bucks Chester and Montgomery Counties. By the evening rush hour, snow will start to filter back in from the west as the second part of the storm moves through. Between 7pm and 8pm, after a brief period of mixing and sleet, snow will encompass almost the entire Delaware Valley. Snow could be heavy at times, with snowfall rates of 1-inch per hour possible. I'm still liking yesterday's snowfall map, with 3-6" in the city, Delaware County and parts of Chester and Montgomery Counties. I also expect 3-6" in much of south-central New Jersey. Roughly 4-8" in parts of Bucks County and 1-3" in northern Delaware, southwest Chester County and South Jersey. Amounts still go higher as you venture northeast. Snow will continue into early Saturday morning, but by daybreak I expect a bilk of the precipitation to have moved off.
A few notes I've been tossing around. If you do travel tonight, I don't think many - if any - of the roads have been pretreated. With the rain we've had today, any brine or salt that was put down has washed away. Hopefully, the area DOTs will get out there as soon as the changeover occurs to plow and treat the roads. Also, be aware of your community's "Snow Emergency" procedure. Announcement's may be made on that late, so to anticipate it would be key.
Winds will also be an issue tonight, as the winds will shift from the northwest and really pick up, to 10 to 20 mph and gusts to 35 mph, making a snowy and cold night even colder. Temperatures tonight in the mid- to upper 20's.
Tomorrow, skies will start to clear behind the storm and with temperatures in the mid-30, some snow might start to melt. It will still be blustery, with winds still sustained at 15 to 25 mph and gusts up to 35 mph.
Sunday, winds calm down with temperatures on the rise and partly sunny skies. Monday, we may see a few snow showers early or even freezing rain but with highs in the mid-40's, they'll turn to rain very quickly. Tuesday looks warm with variable clouds as we're stuck in between two systems. More rain and snow showers are on tap for Wednesday, with still warm temperatures. Thursday will feature clearing to partly cloudy skies and temperatures in the mid-40's. Friday is looking like a great end to the week, with temperatures in the mid 40's and partly to mostly cloudy skies.
We'll have several updates tonight on the progress of this nor'easter.