Storm Super Cells Bringing Flash Flooding, Hail to NSW

Storm supercells bringing up 150 milimetres of rain and 5 centimetre hail stones are likely.

People climb the Sydney Harbour Bridge (background R) as tourists hold umbrellas and take photographs of the Sydney Opera House on a rainy day in Australia on Dec. 21, 2023. David Gray/AFP via Getty Images

Flash flooding, hail, and severe winds will lash large parts of New South Wales (NSW) over the Christmas period with residents told to be alert but not alarmed.

The unsettled weather started on Sunday and is expected to run through to Boxing Day, with much of the eastern coastline at risk.