Slow-moving thunderstorms in Sydney's west could make for a wet and disrupted journey home on Monday.

The threat of severe thunderstorms had temporarily eased just after 6pm, but further thunderstorms were still possible, according to the Bureau of Meteorology.

The storm cells moved through a line from Camden in the south-west Sydney to Windsor in the north-west, cutting power to 5,000 homes and businesses just before 4.30pm.

Fallen trees brought down power lines in Orchard Hills along the Northern Road and Bells Line Road in Kurrajong, affecting traffic in both areas.



The Bureau of Meteorology has now updated its severe weather warning for heavy rainfall, damaging winds and large hailstones to less populated regions in the Blue Mountains.