7:00 AM | *Coastal storm is on the way for late tonight, Saturday and Saturday night...still quite unsettled on Sunday...much warmer by mid-week*
Paul Dorian
6-Day Philly Forecast
Today
Mainly cloudy, still on the cool side for this time of year, a bit of light rain or drizzle at times, highs near 60 degrees
Tonight
Cloudy and chilly with periods of rain; primarily, after midnight, some of the rain can be heavy at times towards morning, lows in the upper 40’s
Saturday
Rain, heavy at times, breezy and quite cool for this time of year, mid 50’s for highs
Saturday Night
Rain still likely during the evening hours, an occasional shower possible after midnight, breezy, chilly, mid-to-upper 40’s for lows
Sunday
More clouds than sun, quite windy and cool, a couple showers are possible; especially, during the afternoon hours and in northern sections, mid-to-upper 60’s
Monday
Partly sunny, breezy, cool, mid-to-upper 60’s
Tuesday
Mainly sunny, seasonably mild, low-to-mid 70’s
Wednesday
Mainly sunny, breezy, warmer, low 80's
Discussion
Low pressure will move along a frontal boundary zone later today and intensify into a significant storm by later tomorrow along the Mid-Atlantic coastline as a pair upper-level lows slowly phase together right on top of the region. This coastal storm will produce a soaking rainfall for the Philly metro region from late tonight into tomorrow night and temperatures will remain well below normal for this time of year. While there will be some improvement on Sunday as the surface storm heads into New England, the atmosphere will remain quite unstable around here with cold air aloft associated with a deep upper-level low. This instability should lead to numerous (cumulus) clouds and a few showers are possible on Sunday; especially, during the afternoon hours and in northern sections. In addition, Mother’s Day will remain quite cool for this time of year and the wind will be quite noticeable on the back side of the storm. Looking ahead, much warmer air is likely to blast into the Mid-Atlantic region by the middle of next week. At the same time, very chilly air will dive into the western US and this combination of warm air to the east and cold air to the west could lead to a major severe weather outbreak in the central Plains come mid-week.
Meteorologist Paul Dorian
Vencore, Inc.
vencoreweather.com