A flash flood warning was released by the National Weather Service on Monday at 7:06 p.m. in effect until 9 p.m. for Allegheny and Butler counties.

On Monday at 5:29 p.m. the National Weather Service released a flash flood warning in effect until 7 p.m. for Passaic County.

A few showers and storms will start to fire up midday. But it's really later this afternoon and evening that storms will become a bit more widespread and heavier, especially off to the south. This moves across Delaware later tonight with heavy rain downpours triggered even further north up toward the city.