Well, here we go. A classic winter nor'easter is forecasted to affect our region starting tonight and into Saturday morning. While the word "nor'easter" may strike fear into the hearts and minds of folks in the Delaware Valley, it won't be that bad. Right now, Winter Storm Watches are in effect for Mercer County, NJ and north and Northampton County, PA and north. I do, however, feel as though this will change, with the watches changed to warnings and at least Winter Weather Advisories posted for areas further south. A separate article will be posted regarding the storm later this evening, where the latest watches and warning will be covered.
Tonight will be mostly cloudy and dry for the most part. Once the precipitation moves in from, southwest to northeast, it may start out as flurries or some light snow showers. No significant accumulation is expected, but you might have to brush it off your car. Between 11pm and 1am, the changeover to rain will occur. A period of mixing might occur before the complete changeover, but by 5am, I expect everyone from Allentown south to be in the rain. Rain will persist throughout the day in these areas, and heavy at times. For the Lehigh Valley, precipitation could waver from snow, sleet, rain. Travel could be treacherous at times. By the evening rush, snow could be starting to filter down, although I think the drive home in the city will just be wet. Around 8pm, snow will be back in the Philadelphia metro as the phased low bombs out near Long Island. Snowfall rates could be heavy at time and the winds will really begin to pick up around this time too. Overnight Friday, the snow will slowly lift off to the northeast and by 9am Saturday, a bulk of the precipitation will have moved off.
Loose snowfall accumulations could range from 3-6" in the city, close to 8" around Trenton and Allentown. Lesser amounts along the coast and far inland, like in Reading. We'll have a special post later this evening with forecast amounts to breakdown the storm further.
Temperatures around the freezing mark tonight and around the 40-degree mark tomorrow. Winds tonight from the east at 5 to 10 mph. Tomorrow, winds will start out of the northeast at 5 to 10 mph but will shift from the northwest later tomorrow afternoon. Once the shift takes place, the winds pick up, sustained at 10 to 20 mph and gusts up to 35 mph.
The rest of Saturday will feature breezy conditions and clearing skies. We could see the sun by Saturday afternoon with high getting up in the mid-30's. Sunday looks like a pleasant winter day with temperatures around 40-degrees. The start of the workweek looks soggy, with mostly cloudy skies and a chance of rain and snow showers. Temperatures Monday getting up into the mid-40's. Tuesday will be a transition day, where we will be in between storms. Skies will be variably cloudy with temperatures in the mid-40's still. The same temperature profile stays in place for Wednesday with another shot of rain and snow showers. Thursday looks breezy and cool with clearing skies.
Stay tuned to phillyweather.net before, during and after the storm.