What to KnowA First Alert for severe storms is in effect from 3 p.m. until 9 p.m. on Monday, Aug. 10 for all neighborhoods in the Philadelphia region.Severe thunderstorms this afternoon could produce damaging wind and downpours leading to localized flooding.Isolated tornadoes are also possible.The s torms will appear first in areas to the northwest, Berks County, Lehigh Valley and the western suburbs.The main window of concern for Philadelphia is 4 p.m.to 8 p.m. and then we could see some stronger storms in Delaware and South Jersey between 8 p.m. and 9 p.m. Monday evening.Get the latest weather updates by downloading the NBC10 app and following the NBC10 First Alert Weather team. The entire Philadelphia region is under a First Alert starting at 3 p.m. on Monday, Aug. 10 as severe thunderstorms could bring damaging winds, downpours and the chance for isolated tornadoes. Follow along belong for live updates as we track the storms. Get the latest weather updates by downloading the NBC10 app and following the NBC10 First Alert Weather team. ...read more read less