Over the next 24 hours, residents of central Pennsylvania should anticipate a gradual change in the weather, with the remnants of Hurricane Erin causing gloomy conditions today and the possibility of severe thunderstorms on Sunday.
Through Thursday, Hurricane Erin’s northeasterly winds and low clouds will continue, with highs in the mid 60s to low 70s. Thursday night, the skies will gradually clear, and valley fog is expected to emerge, particularly in northern regions where highs of the upper 40s are possible.
With partly clear skies, temperatures will rise into the mid 70s and low 80s on Friday, bringing much warmer weather. With temperatures around five degrees above average and the potential for isolated thunderstorms, Saturday will continue the warming trend, mostly west of the Allegheny Front.
On Sunday, a cold front is predicted to bring with it potentially severe thunderstorms, the most major weather event of the day. With Cape values above 1,000 J/kg and wind shear between 25 and 30 knots, meteorologists warn of severe instability, which will foster the development of powerful thunderstorms.
Early next week will see a major cool-down, with temperatures falling five to ten degrees below average. In northwest Pennsylvania, overnight lows may fall close to 40 degrees, while highs will barely make it into the 70s. Significant temperature differences between the lake and the air can also result in lake effect rain showers.
Over the next several days, residents should be ready for sudden changes in temperature and conditions and remain weather-aware, especially on Sunday.
Current weather radar
Weather reports
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This story’s first draft was created by generative AI and then modified and vetted by PennLive.com personnel.
