Philadelphia, Pennsylvania – Thunderstorms and a searing heat index are poised to strike Philadelphia on Thursday, July 17th, with the city facing both public safety and travel challenges. Intense humidity will push the heat index above 100°F while strong storms could trigger power outages and snarl traffic on major roadways including I-76 and I-95.
According to the National Weather Service, a wave of showers and thunderstorms will sweep through the Philadelphia area after 11 a.m. Thursday. The high will reach 92°F, with “heat index values as high as 102°F.” The combination of hot temperatures and moisture will create dangerous conditions for anyone working or spending extended time outdoors. Officials urge residents to limit strenuous activity, stay hydrated, and check on vulnerable neighbors. Sudden downpours and gusty winds may reduce visibility, especially for commuters traveling during the afternoon rush.
The risk continues into Thursday night, when storms may persist before skies turn partly cloudy. Friday brings another round of afternoon showers and storms, with temperatures peaking near 88°F. As the weekend approaches, conditions moderate slightly. Saturday should be mostly sunny, with a high near 88°F, but another round of showers is likely by Saturday night and Sunday. The unsettled summer pattern continues into early next week, with storm chances lingering into Monday.
Stay alert for updated advisories, especially if you plan to travel or spend time outdoors. City officials recommend charging electronic devices and preparing for possible disruptions. Warnings remain in effect through Sunday, July 21st.
Philadelphia Five Day Forecast: July 17th – July 22nd
- Thursday, July 17th: Showers and thunderstorms possible after 11 a.m.; high 92°F, heat index up to 102°F.
- Friday, July 18th: Chance of afternoon storms; high near 88°F.
- Saturday, July 19th: Mostly sunny and hot; high 88°F. Showers possible at night.
- Sunday, July 20th: Showers and thunderstorms likely, especially after 2 p.m.; high 86°F.
- Monday, July 21st: Mostly sunny, warm; high 85°F.
- Tuesday, July 22nd: Partly sunny, chance of showers; high near 84°F.
