Australian Government Bureau of Meteorology
New South Wales
TOP PRIORITY FOR IMMEDIATE BROADCAST
Detailed Severe Thunderstorm Warning
for Heavy Rainfall
for parts of Sydney, Wollondilly/Wingecarribee and Greater Wollongong areas.
Issued at 9:44 am Friday, 12 December 2025.
Heavy rainfall occurring with showers and thunderstorms.
HEAVY RAINFALL for the following areas:
Sydney, Wollondilly/Wingecarribee and Greater Wollongong
The Bureau of Meteorology warns that, at 9:40 am, severe thunderstorms likely to produce heavy rainfall that may lead to flash flooding were detected near Picton, Appin, Waterfall, the Royal National Park, Menangle and Douglas Park. They are forecast to affect Helensburgh, Darkes Forest, Lake Cataract and Thirlmere by 9:55 am and Bargo, Stanwell Park, Buxton and the area south of Wilton by 10:10 am.
Cancellation for the following areas:
Blue Mountains/Hawkesbury
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.
* Unplug computers and appliances.
* Avoid using the phone during the storm.
* Stay indoors away from windows, and keep children and pets indoors as well.
* For emergency help in floods and storms, ring the SES (NSW and ACT) on 132 500.
A more general severe thunderstorm warning is also current for parts of the Metropolitan, Illawarra and Central Tablelands districts.
The next warning is due to be issued by 10:15 am.
Warnings are also available through TV and Radio broadcasts, the Bureau's website at www.bom.gov.au or call 1300 659 210. The Bureau and State Emergency Service would appreciate warnings being broadcast regularly.
Forecast
Morisset Park (33.1214°S, 151.5308°E, 29m AMSL) set as my default location ›
-
7 day forecast
Today: Partly cloudy. Medium chance of showers in the afternoon and early evening. A thunderstorm likely in the afternoon and early evening, possibly severe with heavy rain which may lead to flash flooding near the coast in the afternoon. Light winds becoming E/SE 15 to 20 km/h in the early afternoon then becoming light in the evening. Daytime maximum temperatures 22 to 27.
Forecast for Morisset Park (33.1214°S, 151.5308°E, 29m AMSL) Fri Sat Sun Mon Tue Wed Thu Summary 
Minimum 16° 14° 16° 16° 15° 14° 13° Maximum 23° 29° 34° 23° 22° 25° 29° Chance of rain 90% 40% 50% 50% 30% 10% 20% Likely amount 10-20mm 1-5mm 1-5mm < 1mm < 1mm < 1mm < 1mm UV index Extreme Extreme Extreme Extreme Extreme Extreme Extreme Fire Danger Rating Moderate Moderate High High - - - 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 0
(km/h)8
(km/h)2
(km/h)10
(km/h)7
(km/h)9
(km/h)9
(km/h)16
(km/h)11
(km/h)15
(km/h)5
(km/h)15
(km/h)2
(km/h)14
(km/h)Wind direction ESE E N E NNW NW S SSE SE SE SE ESE ENE E Relative humidity 97% 89% 72% 57% 65% 40% 72% 71% 64% 63% 61% 56% 58% 51% Dew point 19°C 18°C 18°C 18°C 19°C 18°C 16°C 15°C 13°C 13°C 13°C 14°C 14°C 16°C -
Sunrise and sunset times
Sunrise / Sunset for Morisset Park (33.1214°S, 151.5308°E, 29m AMSL) First light Sunrise Sunset Last light Moon rise Moon set Moon phase Last quarter New moon First quarter 5:10am EDT 5:37am EDT 7:58pm EDT 8:25pm EDT 12:56am EDT 12:56pm EDT 
3rd quarter
Last quarter Dec 12 New moon Dec 20 First quarter Dec 28 -
Warnings
- Detailed Severe Thunderstorm Warning (Heavy Rainfall) for parts of Sydney, Wollondilly/Wingecarribee and Greater Wollongong areas
- Detailed Severe Thunderstorm Warning (Heavy Rainfall) for parts of Sydney, Wollondilly/Wingecarribee and Greater Wollongong areas
- Severe Thunderstorm Warning (Heavy Rainfall) for parts of Metropolitan, Illawarra and Central Tablelands
- Severe Thunderstorm Warning (Heavy Rainfall) for parts of Metropolitan, Illawarra and Central Tablelands
-
Temperature for next 7 days
-
Rain for next 7 days
