7:00 AM | **Accumulating snow likely on Saturday after Arctic cold frontal passage**
Paul Dorian
6-Day forecast for the Philadelphia, PA metro region
Today
Mainly cloudy, chilly, a few showers likely this afternoon, highs in the mid 40’s
Tonight
Mainly cloudy early with a shower or two possible, some clearing late, chilly, lows in the upper 30’s
Wednesday
Mainly sunny, cool, lower 50’s for afternoon highs
Wednesday Night
Becoming mainly cloudy, chilly, chance of a shower or two, upper 30’s for late night lows
Thursday
Mainly sunny, chilly, becoming quite windy with gusts to 40 mph, mid-to-upper 40’s
Friday
Mainly sunny, quite cold, breezy, lower 30’s; chance of snow towards morning
Saturday
Snow that will likely transition to a mix of rain, sleet and snow, accumulations are likely before any changeover, mid-to-upper 30’s
Sunday
Partly sunny, windy, cold, possible snow showers early, low-to-mid 30’s
Discussion
A strong cold front will push through the Mid-Atlantic region on Thursday and Arctic air will follow at the end of the work week. High pressure will build across southeastern Canada as we begin the weekend and this system will be a key player in the likelihood of accumulating snow on Saturday. Low pressure will develop over the Midwest on Saturday and a frontal system extending to its east will generate west-to-east moving precipitation which will most likely arrive as snow in the I-95 corridor from DC-to-Philly-to-NYC The low pressure system will head towards the eastern Great Lakes and a secondary system may try to form near the Mid-Atlantic coastline. It is likely that the snow which falls at the onset of the weekend storm system will transition to a mix of rain, sleet and snow and perhaps then change back to all snow before ending early Sunday. The cold air mass that arrives by Friday will be reluctant to give up its ground on Saturday as it’ll be anchored by a strong high pressure system to the north.
Meteorologist Paul Dorian
Perspecta, Inc.
perspectaweather.com