Warnings

Initial Minor Flood Warning For The Upper Nepean, Hawkesbury And Colo Rivers Wed 21 May 2025

Australian Government Bureau of Meteorology, New South Wales
  
Initial Minor Flood Warning For The Upper Nepean, Hawkesbury And Colo Rivers 
Issued at 11:43 AM EST on Wednesday 21 May 2025
Flood Warning Number: 1

MINOR FLOODING LIKELY AT PUTTY ROAD ALONG THE COLO RIVER FROM THURSDAY EVENING
 Showers this week are expected to increase to areas of rain from Wednesday evening into Thursday. Based on forecast rainfall, minor flooding is likely along the Colo River around Upper Colo and Putty Road from Thursday evening. Further rises are possible.
 With forecast rainfall isolated minor flooding is possible along the Hawkesbury River around North Richmond from Thursday evening. Isolated minor flooding is possible along the Upper Nepean River around Menangle Bridge from Friday morning.
 The situation is being closely monitored and this warning will be updated as required.

Upper Nepean River:
Minor flooding may occur along the Upper Nepean River.
The Nepean River at Menangle Bridge is currently at -1.00 metres and steady, below the minor flood level (5.20 metres).
With forecast rainfall the Nepean River at Menangle Bridge may reach the minor flood level (5.20 m) from Friday morning.

Hawkesbury and Lower Nepean River:
Minor flooding may occur along the Hawkesbury River.
The Hawkesbury River at North Richmond (WPS) is currently at 0.10 metres and falling with the tide, below the minor flood level (3.80 metres).
With forecast rainfall the Hawkesbury River at North Richmond (WPS) may reach the minor flood level (3.80 m) from Thursday evening.

Colo River:
Minor flooding is likely along the Colo River around Upper Colo and Putty Road.
There are currently no river level observations along the Colo River at Putty Road, however based on the nearby gauge at Upper Colo the river level is expected to be below the minor flood level at Putty Road (2.70 metres) and steady.
The Colo River at Putty Road is likely to exceed the minor flood level (2.70 m) from Thursday evening. Further rises are possible with forecast rainfall.

Flood Safety Advice:
In life threatening emergencies, call 000 (triple zero) immediately. If you require rescue, assistance to evacuate or other emergency help, ring NSW SES on 132 500.
 * Avoid drowning. Stay out of rising water, seek refuge in the highest available place.
 * Prevent damage to your vehicle. Move it under cover, away from areas likely to flood.
 * Avoid being swept away. Stay out of fast-flowing creeks and storm drains.
 * Never drive, ride or walk through flood water. Flood water can be deceptive and dangerous.}
For more emergency information, advice, and access to the latest river heights and rainfall observations and forecasts:
 * NSW SES: www.ses.nsw.gov.au
 * RMS Live Traffic: www.livetraffic.com
 * Latest River Heights and Rainfall Observations: www.bom.gov.au/nsw/flood/greatersydney.shtml
 * Latest NSW Warnings: www.bom.gov.au/nsw/warnings/
 * Rainfall Forecasts: www.bom.gov.au/australia/meteye/
 * BOM NSW Twitter: www.twitter.com/BOM_NSW

Next issue:
The next warning will be issued by 02:00 pm EST on Thursday 22 May 2025.

Latest River Heights:
Wollondilly River at Jooriland,0.52,Steady,10:45 AM WED 21/05/25
Nattai River at Smallwoods Crossing,0.13,Steady,10:45 AM WED 21/05/25
Warragamba Dam Water Level,-1.28,Steady,11:15 AM WED 21/05/25
Nepean River at Menangle Bridge,-1.00,Steady,11:25 AM WED 21/05/25
Nepean River at Camden Weir,1.06,Steady,10:58 AM WED 21/05/25
Nepean River at Wallacia Weir,0.20,Steady,11:15 AM WED 21/05/25
Nepean River at Penrith,1.03,Steady,11:15 AM WED 21/05/25
Nepean River at Yarramundi,1.07,Steady,11:15 AM WED 21/05/25
Grose River at Burralow,0.89,Steady,10:45 AM WED 21/05/25
Hawkesbury River at North Richmond WPS,0.10,Falling,11:15 AM WED 21/05/25
Hawkesbury River at Windsor PWD,0.46,Falling,11:30 AM WED 21/05/25
Colo River at Upper Colo SWC,0.99,Steady,10:45 AM WED 21/05/25
Hawkesbury River at Sackville,0.14,Falling,11:30 AM WED 21/05/25
Hawkesbury River at Lower Portland,-0.14,Falling,11:30 AM WED 21/05/25
Macdonald River at St Albans,0.22,Steady,10:21 AM WED 21/05/25
Hawkesbury River at Wisemans Ferry,-0.13,Rising,11:30 AM WED 21/05/25

This advice is also available by dialling 1300 659 210. Warning, rainfall and river information are available at www.bom.gov.au/nsw/flood. The latest weather forecast is available at www.bom.gov.au/nsw/forecasts.