Forecasters are tracking a line of strong thunderstorms that is expected to slam into the Philadelphia area Tuesday afternoon, ending one of the more-pleasant stretches of weather this summer.

The National Weather Service Storm Prediction Center says there is an enhanced risk of severe thunderstorms Tuesday in parts of the mid-Atlantic region, including Southeastern Pennsylvania and South Jersey.

The weather service office in Mount Holly said the “storms will be capable of producing damaging winds, tornadoes, large hail, and heavy rainfall that could lead to localized flash flooding.”

A flash flood watch has been issued for the region starting at 2 p.m. Tuesday and lasting until midnight.

That makes Monday the last day in a string of relatively comfortable days that began Friday and were marked by sunny skies, temperatures in the low to mid-80s, and low humidity.

It also might hinder views of the annual Perseid meteor shower, since the storms are expected to rage into early Wednesday.

After that, there’s a chance of showers and thunderstorms in the forecast every day in Philadelphia and at the New Jersey Shore until Friday, when it should become mostly sunny.

The high for Monday and Tuesday is expected to be 88 both days in Philadelphia and in the low 80s at the Shore. The risk of rip currents at the Shore is low for Monday.