17/01/2026
Parts of Sydney, Hunter and Illawarra severe weather
Stay indoors
Watch and Act
The NSW SES is advising people in the following area(s) to STAY INDOORS due to heavy rainfall, intense rainfall, flash flooding:
- Newcastle
- Gosford
- Campbelltown
- Morisset
- Wyong
- Cessnock
The Bureau of Meteorology warns that, at 11:10 pm, VERY DANGEROUS THUNDERSTORMS likely to produce heavy, locally intense rainfall that may lead to dangerous and life-threatening flash flooding were detected near The Entrance, Terrigal and Dora Creek. These thunderstorms are moving towards the northwest. They are forecast to affect Gosford, Wyong and Toukley by 11:40 pm and Budgewoi, Somersby and Doyalson by 12:10 am.
Other severe thunderstorms likely to produce heavy rainfall that may lead to flash flooding were detected near Oran Park, Narellan, the Hawks Nest district and waters off Norah Head. They are forecast to affect Cobbity, Catherine Hill Bay and waters off Catherine Hill Bay by 11:40 pm and Swansea, Lake Macquarie and Silverdale by 12:10 am.
138.5 MM OF RAINFALL WAS RECORDED AT KULNURA IN THE 3 HOURS TO 9:15 PM.
125.5 mm of rainfall was recorded at Woy Woy in the 6 hours to 7:37 pm.
114.6 mm of rainfall was recorded at Mangrove Mountain in the 6 hours to 10:45 pm.
You should monitor the situation as it is constantly changing.
What are we expecting?
The Bureau of Meteorology advises HEAVY TO LOCALLY INTENSE RAINFALL ABOUT THE SOUTHWEST SYDNEY METROPOLITAN AREA AND HUNTER
Weather Situation: A trough along central parts of the coast is generating areas of showers and isolated thunderstorms, with some of these delivering heavy to intense rainfall.
VERY DANGEROUS THUNDERSTORMS are likely to produce heavy, locally intense rainfall that may lead to dangerous and life-threatening flash flooding in the warning area over the next several hours.
This event may change quickly. NSW SES will monitor the situation and update warnings if the situation changes.
View the full warning: https://hazardwatch.gov.au/a/6jhUIE
Download the Hazards Near Me App and set up ‘Watch Zones’ to receive warnings in real time. https://www.nsw.gov.au/emergency/hazards-near-me-app
For emergency assistance during a flood, storm or tsunami, call the NSW SES on 132 500. In a life-threatening emergency, call Triple Zero (000).
Post current at 11:24pm on Saturday 17th January 2026.