Fall-Like Temps, Thunderstorms In PA Forecast Later This Week

PENNSYLVANIA - Autumnal temperatures are coming soon to the region, but not before a summer thunderstorm marks the end of the season.

Wednesday is expected to see patchy morning fog, partly cloudy skies with highs near 83, dropping down to lows around 66, per the National Weather Service. But the temperate weather will start to sour in the overnight hours starting at around 2 a.m., forecasters said.

Thursday is slated to see a mix of showers and thunderstorms throughout the day with new rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. The first official day of fall will also see markedly cooler temperatures in the mid-70s, dropping to a low of 53 in the evening hours as the rain tapers off.

“Elevated instability may result in isolated thunderstorms, but expect overall there to be minimal threat of significant convective threats (severe/flooding),” National Weather Service forecasters said in a morning discussion. In fact, unfortunately for the drought situation, rainfall likely is capped at less than a half inch for most, though locally heavier amounts are possible.”

The silver lining: the weekend is set to be mostly clear, per AccuWeather, with highs in the low 70s.

Here’s the latest forecast, per the National Weather Service:

Wednesday: Patchy fog before 8 a.m. Otherwise, sunny, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.

Wednesday Night: Partly cloudy, with a low around 66. South wind around 5 mph.

Thursday: Showers and thunderstorms before 2 p.m., then showers likely and possibly a thunderstorm between 2 and 4 p.m., then scattered showers and thunderstorms after 4 p.m. High near 79. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night: Scattered showers and thunderstorms before 7 p.m., then isolated showers between 7 and 8 p.m. Mostly cloudy, then gradually becoming clear, with a low around 49. Northwest wind around 10 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: Sunny, with a high near 67. Northwest wind around 15 mph, with gusts as high as 30 mph.

Friday Night: Mostly clear, with a low around 42.