7:00 AM | **Rain-to-snow for a brief time on Tuesday as Arctic air arrives...potential record-breaking cold to follow**

6-Day forecast for the Philadelphia, PA metro region

Today

Partly sunny, mild, highs not far from 60 degrees

Tonight

Mainly cloudy, cold, chance for some rain late, lows in the upper 30’s

Tuesday

Mainly cloudy, turning windy and colder, rain should change to snow for a brief time, temperatures falling through the 30's from early day highs

Tuesday Night

Mainly clear, breezy, becoming very cold and perhaps record-breaking, upper teens for late night lows

Wednesday

Mainly sunny, quite incredibly cold for mid-November, lower 30’s

Thursday

Partly sunny, still very cold for this time of year, near 40 degrees

Friday

Partly sunny, not as cold, upper 40’s

Saturday

Mainly sunny, cold, low-to-mid 40’s

Discussion

First let me mention that today is "Mercury transit day"...a rare astronomical event and the skies are cooperating (see perspectaweather.com for more. A much colder-than-normal air mass for this time of year will arrive in the Mid-Atlantic region early Tuesday. There will be a period of rain from late tonight into tomorrow morning which may change to snow for a brief time as the colder air filters into the region. Temperatures tomorrow night will drop to the upper teens in some spots and some records could fall by Wednesday morning. Temperatures will then struggle to reach the mid 30's on Wednesday – some 25 degrees below normal for this time of year. The unusual early season chill will stick around on Thursday and then there will be some moderation in temperatures at week’s end, but still remaining colder-than-normal.

Meteorologist Paul Dorian
Perspecta, Inc.
perspectaweather.com