More of this ahead this afternoon. Credit:Tom McKendrick

Less than a day after hundreds lost power and traffic chaos descended on the Sydney, another line of storms had been approaching from the north-west.

The bureau had issued a warning for severe thunderstorms including heavy rain and large hailstones for almost the entire state, including for the Sydney metropolitan area, saying they "may even be a bit stronger than yesterday".

Wednesday's storms brought about 24mm of rain to the CBD on Wednesday, most of it falling in about half an hour.

Humid and showery weather may persist for much of the next week, with possible storms forecast again on Friday and Monday for Sydney, the bureau said.