[Mid-day NEXRAD radar image; courtesy University of Wisconsin, NOAA]
Here we are on the last day of March and accumulating snow is falling across much of central and northern Pennsylvania from a fast-moving, but potent "clipper-type" of system that contains plenty of moisture. State College, for example, is reporting big, heavy, wet snowflakes at the mid-day hour and grassy areas are already covered. A blob of precipitation seen on NEXRAD radar is moving southeastward across Pennsylvania at mid-day and it will arrive later this afternoon in SE PA and New Jersey. A chilly rain will develop across SE PA during the next few hours and there can be snowflakes mixed in; especially, in areas well to the north and west of the city of Philadelphia. In areas north of Route I-80, snow is likely to be the predominate form of precipitation this afternoon with a few inches possible in higher elevation locations such as the Poconos.
By early tonight (forecast map below), as low pressure pulls off of the Mid-Atlantic coastline, colder air will shift slightly to the south and east and the odds of seeing snowflakes mixed in with the rain in the far northern and western suburbs of Philly will increase somewhat. The precipitation winds down later tonight and overnight lows will drop to near 30 degrees in suburban areas. April begins tomorrow on a cold note with temperatures well-below normal for this time of year despite plenty of sunshine, but there will be a significant warm up on Thursday and Friday before more colder-than-normal air returns for the upcoming Easter weekend.
[12Z GFS forecast map for early tonight (blue=snow, green=rain); map courtesy "tropicaltidbits.com", NOAA]
6-Day NYC Forecast
Early sunshine will give way to a quick increase in clouds, rain should break out this afternoon mixed with snow at times; especially, to the north and west of the metro region, cold, highs in the low 40’s
A mix of rain and snow could change to all snow before ending later this evening, cold, lows not far from 30 degrees
Mainly sunny, breezy, cold, low-to-mid 40’s
Mostly clear, cold, upper 30’s for lows
Mainly sunny, becoming breezy and much milder, mid-to-upper 50’s
Mostly cloudy, quite breezy and even milder with showers likely, low-to-mid 60's
Lingering morning showers; otherwise, mostly cloudy skies, breezy and colder, low 50's
Mostly sunny, quite chilly for this time of year, near 50 degrees
Yet another disturbance will drop to the southeast today from the Great Lakes region and it should generate rain in the area this afternoon and evening and there can be snowflakes mixed in at times; especially, to the north and west of the metro region. In areas to the north of Route I-80, today's event will feature more snow than rain and higher elevation locations like in NW NJ can receive a few inches of snowfall by later tonight. Precipitation winds down later this evening from the fast-moving clipper system and Wednesday will turn out to be breezy and cold for the first day of April. Much milder air will advance northward into our region on Thursday and then Friday stays quite mild, but showers will be quite likely as the next cold front approaches from the northwest. Colder air will follow the late week frontal system just in time for the upcoming Easter weekend.
7:00 AM | An active start to the week and snow is possible with Tuesday’s disturbance; much milder on Thursday and Friday
6-Day NYC Forecast
Showers of rain or snow will pull away from the region this morning and skies should remain mostly cloudy for the afternoon, becoming breezy and milder, highs in the low-to-mid 50’s late in the day
Partly cloudy, chilly, lows in the mid 30’s
Increasing clouds, cold, snow or a mix of snow and rain likely to develop for the mid-and-late afternoon hours, highs in the low 40's
Snow or snow mixed with rain during the evening, small accumulations possible on grassy surfaces, cold, lows near 30 degrees
Mainly sunny, cold, breezy, low 40’s
Mostly sunny, milder, mid-to-upper 50’s
Mostly cloudy, quite mild, showers likely, near 60 degrees
Mostly cloudy, colder, breezy, chance for showers, upper 40’s
After a weekend with winter-like cold, temperatures will moderate somewhat by later today and there should be a noticeable warm up later in the week with 60 degrees possible on Thursday and Friday. A weak disturbance swinging by to our north this morning produced clouds and showers of rain or snow, but it will push away this afternoon and skies should clear. High pressure will then take control for tonight and early Tuesday, but then yet another disturbance will drop to the southeast from the Great Lakes region and it should produce snow or a mix of rain and snow in the area later tomorrow and early tomorrow night and there is even the chance for some small grassy accumulations. Following that second disturbance, Wednesday looks to be quiet, but chilly, and then it’ll turn significantly milder on Thursday and Friday ahead of the next cold frontal system. That front is likely to generate showers in the region on Friday and then usher in colder air for the upcoming Easter weekend.
7:00 AM | Much cooler today following yesterday’s spike to 62 degrees at Central Park…winter-like cold for the weekend…snow showers even possible at any time from later today through Saturday
6-Day NYC Forecast
Occasional showers this morning and then remaining mostly cloudy this afternoon with a possible rain or snow shower, much cooler than yesterday with highs in the upper 40's
Mostly cloudy with the chance for a few rain showers early and snow showers late, cold, lows near freezing by morning
Mainly cloudy, even colder, a few snow showers are possible, cold, near 40 degrees for highs
Mostly cloudy, very cold, low-to-mid 20's
Mainly sunny, cold, low 40’s
Partly sunny, breezy, not as cold, maybe a shower, low 50’s
Partly sunny, breezy, cool, low 50’s
Partly sunny, a bit milder, low-to-mid 50’s
After a spike in temperatures on Thursday to 62 degrees at Central Park, it has turned much cooler this morning following a cold frontal passage and we'll return to winter-like cold for the weekend. The transition to winter-like cold will continue to generate some rain around here this morning and then, as colder air continues to pour into the region, there is the chance for snow shower activity at just about any time from later today through tomorrow. The atmosphere in the overnight hours and on Saturday will be rather unstable around here thanks to an impressive upper-level wave of energy and it’ll likely be cold enough for any precipitation to fall in the form of snow. The weather quiets down on Sunday, but it’ll remain quite cold for this time of year. In fact, the cold this weekend will not only be quite impressive in the Mid-Atlantic region for late March, but it could turn out to be a widespread low temperature record-breaker come early Sunday morning in many parts of the eastern third of the nation.