6:30 AM | ***Increasingly humid air with late day/nighttime showers and storms...torrential rainfall/severe storms on the table...cooler 2nd half of week..."Debby" impact centered on Friday***
Paul Dorian
6-Day forecast for the Philadelphia, PA metro region
Today
Partly sunny, very warm and humid, chance of late day showers and thunderstorms, some of the rain can be very heavy, some of the storms can be severe, highs near 90 degrees; W-SW winds around 5-10 mph
Tonight
Mainly cloudy, mild, humid, occasional showers and thunderstorms, some of the rain will be very heavy with flash flooding a threat, some of the storms can be severe, lows in the upper 60’s
Wednesday
Mainly cloudy, much cooler, good chance of showers and thunderstorms, some of the rain can be heavy, mid-to-upper 70’s for afternoon highs
Wednesday Night
Mainly cloudy, mild, chance of showers and thunderstorms, low-to-mid 60’s for late night lows
Thursday
Mainly cloudy, cool, chance of showers and thunderstorms, some of the rain can be heavy, low-to-mid 70’s
Friday
Mainly cloudy, cool, breezy, chance of showers and thunderstorms, some of the rain can be heavy, mid-to-upper 70’s
Saturday
Partly sunny, a bit warmer, breezy, chance of showers and thunderstorms, near 80 degrees
Sunday
Mainly sunny, comfortably warm, upper 70’s
Discussion
Despite the fact that the center of Tropical Storm Debby will likely not move to the Mid-Atlantic region until the end of the week, its influence around here will actually begin late today and tonight. The combination of an increasingly tropical air mass and an incoming cold frontal system will result in late day and nighttime showers and thunderstorms. Some of the rain will be very heavy at times and flash flooding may become a concern during the overnight hours. In addition, some of the storms that form late today and tonight can reach severe levels. It turns much cooler for the second half of the week following the passage of the cold frontal system which will actually stall out just to the south of here.
Tropical Storm Debby is now near the Georgia/South Carolina coastal border region and it will meander to a position just off the South Carolina coast by late today and tonight. Some re-intensification is possible on Wednesday while TS Debby is out over the open waters of the southwestern Atlantic and then a second landfall is likely on Thursday somewhere along the South Carolina coast. After that, the tropical storm is probably going to be kicked out to the north and move into the Mid-Atlantic region which likely results in additional heavy rainfall around here from later Thursday into early Saturday.
Meteorologist Paul Dorian
Arcfield Weather