What to KnowA FIRST ALERT is in effect for the Philadelphia region due to poor air quality and severe thunderstorms on Saturday, July 18, 2026. While the air quality is expected to improve over the weekend, the next threat on Saturday will be severe storms that could bring heavy rain, flooding and possible tornadoes. However, the lingering wildfire smoke on Saturday could possibly lessen the impact.Get the latest weather updates by downloading the NBC10 app and following the NBC10 First Alert Weather team.
A FIRST ALERT is in effect for the Philadelphia region due to poor air quality and severe thunderstorms on Saturday, July 18, 2026.
Follow along below for live updates.