7:00 AM | Threat for occasional heavy rain continues through tomorrow with possible additional flash flooding; Leslie bears watching this week along the northeast US coast
Mostly cloudy with occasional showers and a possible thunderstorm or two, some of the rain can be heavy, muggy, highs in the low 80's
Mostly cloudy with showers likely and a possible thunderstorm, some of the rain can be heavy, muggy, lows near 70 degrees
Mostly cloudy with the chance for more showers and thunderstorms, some of the rain can be heavy, muggy, low 80’s
Mostly cloudy with possible showers and thunderstorms, some of the rain can be heavy, muggy, lows in the upper 60’s
Partly sunny, warm, muggy, still the chance for a shower or thunderstorm, mid 80’s
Mostly sunny, warm, low-to-mid 80's
Partly sunny, humid, chance for showers and thunderstorms, near 80
Partly sunny, still the chance for showers and thunderstorms, upper 70’s
A slow-moving frontal system continues to supply a boundary zone for low pressure to move along and this combined with moist air left behind by Isaac will continue our shower and thunderstorm threat for a couple more days. While much of the time will be rain-free, a shower or thunderstorm can occur at just about any time through Wednesday and the rain will fall heavily at times. Flash flooding is a real concern in the entire Philly metro region given the heavy rainfall of the past 36 hours and the expected heavy rainfall over the next 36 hours. The end of the week is likely to remain rain-free; however, more rain is possible this weekend.
Elsewhere, Tropical Storm Leslie is moving slowly across the Atlantic and it will continue to move on a slow pace for the next several days. This system is very likely to become a large Atlantic hurricane later this week as it moves slowly to the north and northwest. There are still some indications that Leslie can come uncomfortably close to the Northeast US coast by early next week so it will be closely monitored. At a minimum, given its expected size, strength and slow-movement, Leslie will produce rough surf up and down the east coast for much of the week.