Source: Bureau of Meteorology

For people in parts of Gosford/Wyong and Sydney areas.

Issued at 2:50 am Wednesday, 18 March 2026.

Slow moving thunderstorms producing heavy rain along the central NSW coast.

The Bureau of Meteorology warns that, at 2:45 am, severe thunderstorms likely to produce heavy rainfall that may lead to flash flooding were detected near Gosford and Manly. These thunderstorms are moving towards the north. They are forecast to affect Terrey Hills, Gordon and Hurstville by 3:15 am and Mona Vale, Wyong and Sydney Olympic Park by 3:45 am.

The State Emergency Service advises that people should:
* Keep clear of creeks and storm drains.
* Don't walk, ride your bike or drive through flood water.
* If you are trapped by flash flooding, seek refuge in the highest available place and ring 000 if you need rescue.
* Stay indoors away from windows, and keep children and pets indoors as well.
For emergency help in flood and storms, ring the SES on 132 500.
Stay updated on the Hazards Near Me NSW app or the ACT ESA website (https://esa.act.gov.au).