21/08/2025
IDN36609
Australian Government Bureau of Meteorology
Minor Flood Warning for the Hawkesbury and Nepean Rivers
at Menangle, Wallacia, North Richmond, Windsor and Putty Road
Issued at 9:37 am AEST on Friday 22 August 2025
Flood Warning Number: 7
MINOR FLOODING OCCURRING AT MENANGLE BRIDGE AND PUTTY ROAD
MINOR FLOODING POSSIBLE AT NORTH RICHMOND FROM FRIDAY AFTERNOON
FLOODING NO LONGER EXPECTED AT WALLACIA WEIR AND WINDSOR
Moderate rainfall has been observed over the Hawkesbury and Nepean River catchments from Wednesday evening and during Thursday, resulting in river level rises along the Hawkesbury, Nepean and Colo Rivers. Minor flooding is occurring at Menangle Bridge and Putty Road. Minor flooding is possible at North Richmond from Friday afternoon. River Levels at Wallacia Weir and Windsor may peak below the minor flood level Friday afternoon.
The situation is being closely monitored and this warning will be updated as required.
A Flood Watch is current for the Upper Coxs and Macdonald Rivers.
Upper Nepean River:
Minor flooding is occurring along the Nepean River at Menangle Bridge.
The Nepean River at Menangle Bridge peaked around 7.30 m around 01:45 Friday morning. The river is currently at 6.34 m and falling, with minor flooding. The Nepean River at Menangle Bridge is likely to fall below the minor flood level (5.20 m) Friday afternoon.
The Nepean River at Wallacia Weir is currently at 3.43 m and rising, below the minor flood level. The Nepean River at Wallacia Weir may peak below the minor flood level (5.00 m) Friday afternoon.
Hawkesbury and Lower Nepean River:
Minor flooding may occur along the Hawkesbury River at North Richmond.
The Hawkesbury River at North Richmond WPS is currently at 3.36 m and steady, below the minor flood level. The Hawkesbury River at North Richmond WPS may exceed the minor flood level (3.80 m) Friday afternoon. The river may peak near 4.30 m overnight Friday into Saturday, with minor flooding.
The Hawkesbury River at Windsor PWD is currently at 3.18 m AHD and steady, below the minor flood level. The Hawkesbury River at Windsor PWD may peak below the minor flood level (5.80 m AHD) Friday afternoon.
Colo River:
Minor flooding is estimated to be occurring along the Colo River at Putty Road.
There are no current observations along the Colo River at Putty Road, however based on the nearby gauge it is estimated that the water level is above the minor flood level (2.70 m) and near a peak of around 4.50 m. The Colo River at Putty Road is likely to remain above the minor flood level (2.70 m) during Friday.
Safety Advice:
Don't drive, walk, swim or play in floodwater because it is dangerous.
Stay away from flooded drains, rivers, streams and waterways.
Obey road closure signs. Plan ahead so you don't drive on flooded roads.
Check the ABC and local media for updates. The situation can change quickly, so stay informed.
For local emergency management warnings and advice visit www.ses.nsw.gov.au.
For emergency assistance call SES on telephone number 132 500. In life-threatening emergencies, call 000 (triple zero) immediately.
Next Issue:
The next warning will be issued by 05:00 PM AEST on Friday 22 August 2025.
Latest River Heights:
Location River Height Tendency Time of Observation
Wollondilly River at Jooriland 2.87 m Rising 4:45 am Fri 22/08/25
Kowmung River at Cedar Ford 1.97 m Falling 4:00 am Fri 22/08/25
Nattai River at The Causeway 0.69 m Falling 8:45 am Fri 22/08/25
Warragamba River at Warragamba Dam -0.00 m Rising 9:15 am Fri 22/08/25
Nepean River at Menangle Bridge 6.34 m Falling 9:28 am Fri 22/08/25
Nepean River at Camden Weir 4.34 m Falling 9:29 am Fri 22/08/25
Nepean River at Wallacia Weir 3.43 m Rising 9:15 am Fri 22/08/25
Nepean River at Penrith 2.61 m Steady 9:15 am Fri 22/08/25
Nepean River at Yarramundi 3.82 m Steady 9:15 am Fri 22/08/25
Hawkesbury River at North Richmond WPS 3.36 m Steady 9:15 am Fri 22/08/25
Hawkesbury River at Windsor PWD 3.18 mAHD Steady 9:15 am Fri 22/08/25
Colo River at Upper Colo SWC 6.78 m Falling 8:45 am Fri 22/08/25
Macdonald River at St Albans 1.94 m Rising 9:29 am Fri 22/08/25
Hawkesbury River at Sackville 1.72 mAHD Rising 9:15 am Fri 22/08/25
Hawkesbury River at Lower Portland 1.41 mAHD Rising 9:15 am Fri 22/08/25
Hawkesbury River at Webbs Ck (Wisemans Ferry) 1.04 mAHD Rising 9:15 am Fri 22/08/25
This advice is also available by dialling 1300 659 219. Warning, rainfall and river information are available at http://www.bom.gov.au/australia/flood.
