Franklin PA- 655 PM EDT Tue Aug 17 2021 ...A strong thunderstorm will impact portions of southern Franklin County through 730 PM EDT... At 655 PM EDT, Doppler radar was tracking a strong thunderstorm near Greencastle, moving northeast at 20 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Chambersburg, Greencastle, St. Thomas, Marion, Claylick, Williamson and Upton. PRECAUTIONARY/PREPAREDNESS ACTIONS... If outdoors, consider seeking shelter inside a building. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service.