7:00 AM | Another spectacular air mass for this time of year to start the week, but very warm and humid conditions for Tuesday, Wednesday, Thursday; much cooler again at the end of the week
Mostly sunny, refreshingly cool, highs in the mid 70’s
Becoming mostly cloudy, more humid, not as cool as last night, lows by morning in the low 60’s
More clouds than sun, very warm, humid, upper 80's
Partly cloudy, mild, muggy, upper 60’s
Partly sunny, very warm, humid, chance for showers and thunderstorms late in the day or at night, near 90
Partly sunny, very warm, humid, showers and thunderstorms likely and some of the storms can be strong, mid-to-upper 80’s
Mostly sunny, breezy, cooler, less humid, low-to-mid 70’s
Mostly sunny, cool, near 70
A cool front passed through the region on Sunday and the new work week will start on a very pleasant note as yet another Canadian-born high pressure system heads our way. The high will quickly shift off the coast on Tuesday and this will open the door for very warm and humid conditions to move back into the Mid-Atlantic region for the period of Tuesday, Wednesday and Thursday. While the entire month of August did not produce a single 90 degree day in Philly, there is a chance for that to happen here in September both tomorrow and on Wednesday. A strong cool front will then pass through the region on Thursday bringing with it the chance for strong thunderstorms, and then another cool air mass will follow for Friday and Saturday. In fact, this next cool air mass will likely be the coolest yet this season with highs on Saturday struggling to reach the 70 degree mark.
Elsewhere, Tropical Storm Humberto has formed in the eastern Atlantic. It has a chance to become a hurricane within the next 48 hours or so. If this happens, it would be the first hurricane of the season which is very late for that to occur. In fact, if Humberto does not reach hurricane status by Thursday then this would be the latest start to a tropical season without a hurricane in the satellite era (since mid 1960's).