The tornado warnings in Atlantic and Ocean counties in New Jersey are no longer in effect on Wednesday night. Earlier Wednesday, a tornado warning in New Castle County, Delaware, expired at around 9:15 p.m. A severe thunderstorm watch was in effect across much of the Philadelphia region for Wednesday evening.

Residents in parts of New Jersey and Philadelphia shared photos of yellow sky, as tornado and thunderstorm warnings were in effect. What does it mean?

Rounds of violent storms that arrived during the peak afternoon commuting period Tuesday set off four tornado warnings, took down trees, and flooded roadways across the region — with a sequel possible later in the week.