Incoming Storms To Bring Change To Eastern PA Weather

EASTERN PENNSYLVANIA — A Hazardous Weather Outlook has been issued for a batch of heavy storms expected across the Philadelphia region mid-week. The storms will usher in some cooler temperatures and less-humid air, forecasters predict.

Widespread showers and thunderstorms are expected to develop Wednesday afternoon and evening, the National Weather Service said. "Storms may produce damaging wind gusts and localized flash flooding," the Hazardous Weather Outlook said. The storms may continue through Thursday.

Once the rough weather passes through, we're in store for what looks to be a pleasant summer weekend. High temperatures will drop to the low 80s by Saturday.

"Some of the storms will be marginally severe," AccuWeather Meteorologist Clay Chaney said in a news release.

Air following the storms will come in from north-central Canada, making it feel much less humid, AccuWeather said. "While daytime highs may be close to average, nighttime lows will likely be several degrees below average," Chaney said.

Here is the forecast:

Today: A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.

Tonight: A chance of showers and thunderstorms, mainly before 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 71. Light south wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday: A slight chance of showers, then showers and thunderstorms likely after 11am. Some of the storms could produce gusty winds and heavy rain. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 89. Calm wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: Showers and thunderstorms likely, mainly before 2am. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a low around 69. South wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Thursday: A chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 89. West wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 30%.

Friday: Sunny, with a high near 85.

Friday Night: Mostly clear, with a low around 63.