This footage, via NSW Incident Alerts, was captured in Penrith just after 4pm. The storm is part of the system headed our way.
NEWCASTLE and Central Coast residents are being warned to brace for severe thunderstorms, large hailstones and heavy rain.
The Bureau advises that the heavy rain may lead to flash flooding in other parts of the state including Sydney, Penrith, Parramatta and Katoomba.
For more information, visit the Bureau of Meteorology's website here.
If you catch Mother Nature putting on a spectacular light display, send your pictures to firstname.lastname@example.org. But above all, stay safe.