More than 12mm of rain was recorded at Sydney Airport between 4.30pm and 5pm, while severe thunder and lightning rocked the city.
The intense system was driven straight at the CBD by strong south-westerly winds.
More than 22mm of rain was recorded in the Illawarra. Wind gusts exceeding 50km/h were also recorded along the NSW south coast. Sydney Airport received wind gusts approaching 60km/h.
The storm proved a nightmare for peak-hour commuters, with a number of roads and train lines suffering minor flooding.
Trains were delayed on the Bankstown line after the tracks were partially closed by flooding near Marrickville station. The Transport Management Centre also reported the delays were exacerbated as emergency authorities treated a person injured by a train at Dulwich Hill.
Replacement buses were organised for travellers.
Passengers travelling on the Eastern Suburbs & Illawarra Line and South Coast Line have been advised to allow additional travel time due to a power supply problem at Sydenham.
For the latest public transport information, visit www.transportnsw.info or call 131 500.
Wind gusts exceeding 50km/h have also been recorded along the NSW south coast.
While the thunderstorms were expected to have cleared by today, intermittent showers are predicted to last right through to the weekend.
Last week the Bureau of Meteorology warned Sydneysiders to seek shelter and “get home early” as an intense tempest approached the city. - Daily Telegraph.