Australian Government Bureau of Meteorology
New South Wales
TOP PRIORITY FOR IMMEDIATE BROADCAST
Detailed Severe Thunderstorm Warning
for Intense Rainfall
for parts of Gosford/Wyong and Sydney areas.
Issued at 2:20 pm Saturday, 17 January 2026.
INTENSE RAINFALL WITH THUNDERSTORMS NORTH OF SYDNEY AND SOUTHERN CENTRAL COAST.
INTENSE RAINFALL for the following areas:
Gosford/Wyong and Sydney
The Bureau of Meteorology warns that, at 2:20 pm, a VERY DANGEROUS THUNDERSTORM likely to produce intense rainfall that may lead to dangerous and life-threatening flash flooding was detected near Palm Beach and Umina. This thunderstorm is slow moving. It is forecast to affect Woy Woy, Terrigal and Avoca Beach by 2:50 pm and Gosford, Brooklyn and Erina by 3:20 pm.
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).
A more general severe thunderstorm warning is also current for parts of the Metropolitan, Central Tablelands, Southern Tablelands, Hunter and Illawarra districts.
Other warnings may be current.
The next warning is due to be issued by 3:20 pm.
Check https://www.bom.gov.au/weather-and-climate/warnings-and-alerts. Warnings are also available through TV and Radio broadcasts or call 1300 659 210. The Bureau and State Emergency Service would appreciate warnings being broadcast regularly.
Forecast
Lake Munmorah (33.1941°S, 151.5704°E, 15m AMSL) set as my default location ›
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7 day forecast
Today: Cloudy. Very high chance of showers about the Lower Hunter, medium chance elsewhere. The chance of a thunderstorm, possibly severe with heavy rain which may lead to flash flooding about the Lower Hunter. Winds S/SE 20 to 30 km/h. Daytime maximum temperatures 21 to 28.
Forecast for Lake Munmorah (33.1941°S, 151.5704°E, 15m AMSL) Sat Sun Mon Tue Wed Thu Fri Summary
Minimum 19° 18° 18° 17° 17° 16° 18° Maximum 24° 24° 25° 25° 24° 26° 26° Chance of rain 80% 90% 60% 70% 40% 40% 20% Likely amount 20-40mm 20-40mm 1-5mm 1-5mm < 1mm < 1mm < 1mm UV index Extreme Extreme Extreme Extreme Extreme Extreme Extreme Fire Danger Rating Moderate No Rating No Rating Moderate - - - Frost risk Nil Nil Nil Nil Nil Nil Nil 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm Wind speed 33
(km/h)32
(km/h)26
(km/h)34
(km/h)22
(km/h)27
(km/h)19
(km/h)28
(km/h)21
(km/h)30
(km/h)14
(km/h)23
(km/h)10
(km/h)23
(km/h)Wind direction S SSE SE SE SE SE SSE SSE SSW S SW SSE S ESE Relative humidity 83% 79% 86% 82% 77% 70% 75% 68% 72% 63% 74% 66% 75% 67% Dew point 21°C 19°C 17°C 19°C 16°C 17°C 16°C 17°C 15°C 15°C 16°C 18°C 17°C 18°C -
Sunrise and sunset times
Sunrise / Sunset for Lake Munmorah (33.1941°S, 151.5704°E, 15m AMSL) First light Sunrise Sunset Last light Moon rise Moon set Moon phase New moon First quarter Full moon Last quarter 5:33am EDT 6:01am EDT 8:06pm EDT 8:34pm EDT 4:00am EDT 7:12pm EDT
Waning crescent
New moon Jan 19 First quarter Jan 26 Full moon Feb 02 Last quarter Feb 09 -
Warnings
- Detailed Severe Thunderstorm Warning (Intense Rainfall) for parts of Gosford/Wyong and Sydney areas
- Detailed Severe Thunderstorm Warning (Intense Rainfall) for parts of Gosford/Wyong and Sydney areas
- Severe Thunderstorm Warning (Heavy Rainfall) for parts of Metropolitan, Central Tablelands, Southern Tablelands, Hunter and Illawarra
- Severe Thunderstorm Warning (Heavy Rainfall) for parts of Metropolitan, Central Tablelands, Southern Tablelands, Hunter and Illawarra
- cancellation of coastal hazard Warning for Sydney Metropolitan, Hunter, Illawarra & Mid North and South coasts
- cancellation of coastal hazard Warning for Sydney Metropolitan, Hunter, Illawarra & Mid North and South coasts
- Gale Warning for Illawarra Coast. Strong Wind Warning for Sydney Enclosed Waters & Hunter, Sydney & Batemans coasts. Cancelled Eden Coast
- Hazardous Surf Warning for Hunter, Sydney, Illawarra, Batemans and Eden coasts
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Temperature for next 7 days
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Rain for next 7 days