7:00 AM | ***Some accumulating snow early tomorrow upon the arrival of another Arctic air mass***
Paul Dorian
6-Day forecast for the Philadelphia, Pennsylvania metro region
Today
Partly sunny, quite breezy, becoming milder, highs in the low-to-mid 40’s; SW winds at 10-15 mph; gusts to 30 mph
Tonight
Mainly cloudy, cold, rain is likely to develop around midnight or so and it will likely mix with or change to snow by daybreak, lows near 30 degrees late
Thursday
A period of snow in the morning; otherwise, mainly cloudy skies, breezy, cold, temperatures falling slowly through the day into the mid 20’s during the afternoon
Thursday Night
Partly cloudy, breezy, bitter cold, 10-15 degrees for late night lows
Friday
Sunshine followed by increasing clouds, very cold, lower 20’s; chance of snow at night
Saturday
Mainly cloudy, cold, chance of snow, mid-to-upper 20’s
Sunday
Partly sunny, cold, lower 30’s
Monday
Mainly sunny, cold, upper 20’s
Discussion
Accumulating snow is likely early tomorrow upon the arrival of the next Arctic air mass as low pressure will form along an incoming frontal boundary zone. Rain will break out later tonight ahead of the Arctic front, but then mix with or change to snow towards daybreak as colder air filters into the region. The threat of snow will be greatest for about a 5 or 6 hour period from its likely beginning in the 5-7 AM time period. I expect accumulations of 1-3 inches in the Philly metro region with isolated higher amounts possible, and while not a significant amount, the timing of the snow will not be great as it will coincide with at least part of the AM rush hour on Thursday. Bitter cold air will flow in behind the system on Thursday night and Friday and then another low pressure system will have to be watched for the early part of the weekend. Currently, that system is more likely to generate accumulating snow to the south and east of the DC-to-Philly-to-NYC corridor with a possible focus on the zone from southeastern Virginia to the Delmarva Peninsula to coastal southern New Jersey…still a close call though.
Meteorologist Paul Dorian
Arcfield Weather