7:00 AM | *Hottest weather this week comes on Thursday....shower/storm threat Friday into Saturday and some of the rain can be heavy*

6-Day forecast for the Philadelphia, PA metro region

Today

Mainly sunny, quite warm, comfortable humidity levels, highs in the mid-to-upper 80’s; N winds around 5 mph

Tonight

Mainly clear, mild, becoming muggy, lows in the upper 60’s

Thursday

Mainly sunny, hot, humid, chance for a late day shower or thunderstorm, middle 90’s for afternoon highs

Thursday Night             

Mainly cloudy, mild, muggy, chance of showers and thunderstorms, lower 70’s for late night lows

Friday

Partly sunny, quite warm, humid, chance of showers and thunderstorms, some of the rain can be heavy, near 90 degrees

Saturday

Partly sunny, warm, chance of showers and thunderstorms, mid 80’s

Sunday

Mainly sunny, quite warm, chance of showers and thunderstorms, upper 80’s

Monday

Partly sunny, very warm, chance of showers and thunderstorms, near 90 degrees

Discussion              

After a sunny and warm day here at mid-week, southwesterly flow will increase tonight and begin funneling in a hotter and more humid air mass into the Mid-Atlantic region from the Tennessee Valley. In fact, temperatures on Thursday afternoon are likely to reach their peak for the week climbing to the middle and upper 90’s in the DC-to-Philly-to-NYC corridor…maybe even a flirtation with the 100 degree mark in some spots. In addition to the heat, dew point temperatures will climb into the lower 70’s tomorrow indicative of high humidity levels making for quite uncomfortable conditions and heat indices above 100 degrees. After the high heat and humidity of Thursday, attention will turn to an approaching frontal system from the northwest that will be a slow-mover. The front will stall on Friday in an environment that will be very moist and - with some support aloft associated with a long-wave trough - ingredients may come together for numerous showers and thunderstorms including the threat of downpours. In fact, this same front is likely to meander in the Mid-Atlantic region this weekend and additional pieces of energy will rotate through the upper-level trough keeping it unsettled with additional showers and thunderstorms on the table. Any shower or storm that does this form this weekend will also have the capability of producing heavy rainfall in the Mid-Atlantic similar to what can take place on Friday.

Meteorologist Paul Dorian
Arcfield Weather