7:00 AM | *Arctic blast arrives Saturday night following a warm Friday and Saturday*
Paul Dorian
6-Day Philly Forecast
Today
Mainly sunny, quite warm for this time of year, highs in the mid 60’s
Tonight
Mainly clear, chilly, patchy fog possible late, lows in the lower 40's
Saturday
Sun followed by increasing clouds, still warm and becoming quite breezy, chance for a shower or two late in the day, mid 60’s
Saturday Night
Mainly cloudy, windy and turning colder, a few rain and/or snow showers are possible, lows in the mid 30’s
Sunday
Windy and cold with mainly cloudy, a few rain and/or snow showers are possible, winds could gust past 40 mph, mid 40’s
Monday
Still windy and cold with partly sunny skies, low-to-mid 40’s
Tuesday
Mainly sunny, still cold, light winds, mid 40’s
Wednesday
Partly sunny, not as chilly, chance for showers later in the day and at night, near 50 degrees
Discussion
Today and Saturday will feature well above normal temperatures in the I-95 corridor, but all of that will change by Sunday with the passage of a strong cold frontal system. This front will blast through the region on Saturday night – perhaps accompanied by rain shower activity - and it will usher in the first true blast of Arctic air this season. As the Arctic air flows over the still relatively warm water temperatures of the Great Lakes this weekend, it will generate the first widespread Great Lakes effect snows of the season for those places just downstream; especially, in higher elevation locations. In fact, given the vast difference in temperatures expected this weekend between the warm water and cold Arctic air, thundersnows could develop explosively resulting in substantial snowfall in some places just downstream. Snow showers could even push into areas east of the mountains later this weekend and reach all the way into the immediate I-95 corridor. Winds on Sunday could gust past 40 mph out of the northwest and temperatures should be confined to the 40’s along with the aforementioned chance of snow showers. It stays quite cold on Monday and Tuesday before a slight warm-up arrives at mid-week. Unfortunately, that mid-week slight warm up will likely be accompanied by a storm system traveling northeast from the Midwest and rain showers are possible here in the Wednesday/Thursday time frame.
Meteorologist Paul Dorian
Vencore, Inc.
vencoreweather.com