Weather Warning
IDN36609
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.
Hawkesbury and Lower Nepean River
Minor flooding may occur along the Hawkesbury River.
Colo River
Minor flooding is likely along the Colo River around Upper Colo and Putty Road.
Latest River Heights
| Location | Height of River (m) | Tendency | Date/Time of Observation |
|---|---|---|---|
| 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 |