Sunday, September 02, 2012

Forecast for Monday, September 3, 2012

A nearly stationary frontal boundary continues to be the focus for waves of low pressure, resulting in rounds of scattered showers across our region. Some greater instability, particularly over southern portions of our region, has resulted in some thunderstorms that are moving slowly with torrential rainfall. As a result, a flash flood is in progress in southern portions of Delaware.

On Monday, another round of scattered showers with some isolated thunderstorms can be expected. Any thunderstorm will once again produce very heavy rainfall which may result in localized flash flooding.

On Tuesday into Wednesday, the remnant energy of Issac rides along the frontal boundary over our region. This will enhance the precipitation coverage along the front and create concern for widespread thunderstorms and showers that will be drenching in nature. Any shower or thunderstorm could be slow moving in addition to thunderstorms training over the same areas. With plenty of moisture by this point to ring out…expect some flash flooding and even some waterway flooding…which may very well be more widespread than what we are currently observing tonight and expect to see on Monday. There is a marginal threat at best for an isolated wet micro-burst or tornado during this period. A cold front sweeps everything out of here Thursday and leaves us with drier air and sunshine on Friday and Saturday. Another cold front will bring the chance for showers and thunderstorms on Sunday or next Monday. I would definitely send an umbrella or rain jacket with the kids heading to the bus stops on Tuesday and Wednesday as schools return to session.

Meanwhile, tropical activity in the Atlantic will be meandering on the edges of the Western Atlantic and will increase swells. As a result, an increase in dangerous rip currents is anticipated with a moderate to high risk of rip currents along the beaches this week. With many lifeguard operations ending on Monday, please use extreme caution if you swim in the ocean this week. While the troughing along the East Coast should push these tropical systems away from the East Coast...we need to keep a close eye on these systems just in case things change in the expected set up. Have a good Labor Day holiday!