Extreme Heat, Severe Storms Monday In Eastern PA

EASTERN PENNSYLVANIA — Extreme heat Monday with temperatures that will feel as hot as 100 degrees will give way to a week of unsettled, stormy weather, forecasters say.

The National Weather Service has issued a heat advisory from noon to 6 p.m. Monday. Heat index values of up to 100 are expected across the Philadelphia region.

Severe thunderstorms are likely in the evening, between 5 and 8 p.m. Some storms could be severe, with hail, gusty winds, heavy rain, and frequent lightning, the National Weather Service said.

But it won't end this evening: there's a chance of severe thunderstorms and heavy rain on Tuesday as well. The chance of storms lingers through Wednesday, although those storms don't appear to be as threatening, according to the National Weather Service's forecast.

Things will settle Thursday, when it will be sunny but hot with highs above 90.

Stormy conditions return Friday, when there's a 40 percent chance of thunderstorms. The pattern could continue into the weekend, as current predictions indicate there's a chance of storms both days.

Here is the forecast:

Today: Showers and thunderstorms likely, mainly after 5 p.m. Some storms could be severe, with hail, gusty winds, heavy rain, and frequent lightning. Increasing clouds, with a high near 95. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60 percent. New rainfall amounts between a quarter and half of an inch possible.

Tonight: Showers and thunderstorms likely, mainly before 8pm. Some storms could be severe, with hail, gusty winds, heavy rain, and frequent lightning. Patchy fog after 5 a.m. Otherwise, mostly cloudy, with a low around 69. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60 percent. New rainfall amounts between a quarter and half of an inch possible.

Tuesday: A chance of showers and thunderstorms, mainly after 2 p.m. Some of the storms could produce heavy rainfall. Patchy fog before 8am. Otherwise, partly sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30 percent. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night: A chance of showers and thunderstorms, mainly before 8 p.m. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 71. South wind around 5 mph. Chance of precipitation is 30 percent. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 90. South wind around 5 mph. Chance of precipitation is 50 percent. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: A chance of thunderstorms before 8 p.m. Partly cloudy, with a low around 71. Chance of precipitation is 30 percent. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday: Mostly sunny, with a high near 91.

Thursday Night: Partly cloudy, with a low around 72.

Friday: A chance of showers, with thunderstorms also possible after 8 a.m. Partly sunny, with a high near 87. Chance of precipitation is 40 percent.

Friday Night: A chance of showers before 2 a.m. Mostly cloudy, with a low around 72. Chance of precipitation is 30 percent.

Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 40 percent.

Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 30 percent.

Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40 percent.