Central Pennsylvania residents can expect a wet start to the final days of astronomical summer, with increasing rain chances and mild temperatures through early next week.
A series of weather systems will bring scattered showers and potential thunderstorms, particularly in the northwestern regions of the state.
The National Weather Service forecasts scattered showers developing late Sunday night into early Monday, with the highest probability of precipitation in the northwestern half of central Pennsylvania.
Temperatures will remain above average, with highs ranging from the mid-70s in higher terrain to around 80 degrees in lower-lying areas.
A warm frontal system will trigger shower and thunderstorm activity late Monday afternoon and evening, with the greatest chances along the northwestern zones.
Wind speeds will be moderate, with east-southeast winds of 5 to 10 mph, and occasional gusts near 20 mph in the Laurel Highlands and northwest mountain regions.
The weather pattern becomes more unsettled midweek, with the highest rain chances from late Wednesday through Friday evening. A slow-moving low-pressure system crossing the Central Plains and Mid-Mississippi Valley will bring additional precipitation opportunities. Weekend conditions are expected to feature lingering scattered showers.
Astronomically, fall officially begins on Monday, Sept. 22, at 2:19 p.m. EDT, marking the end of summer and the start of a season that will last 89 days, 20 hours, and 43 minutes.
Residents should be prepared for changing conditions and have plans to seek shelter if thunderstorms develop. Stay informed about local weather updates and be ready for potential travel disruptions due to intermittent rainfall.
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