Northern NSW Southern QLD High Flood Risk Sept-Nov 2021

Northern NSW Southern QLD High Flood Risk Sept-Nov 2021

Flood Risk Assessment 

Areas across Southern inland QLD and Northern inland NSW have recorded above average rainfall during the past few 6 months. Recent rainfall through Winter is continuing to keep the ground saturated with dams, rivers, creeks and streams continuing to run and fill up. Small amounts of rainfall under 50mm across these catchments are causing renewed water flows resulting in flash flooding. Storage dams are filling up with levels between 74% (Copeton Dam) and 100% or spilling (Pindari, Chaffey, Coolmunda and Storm King Dams).
The following basins and catchments have a medium to high risk of flooding during the next 3 to 6 months –
QLD: The Condamine, Macintyre, Moonie and Balonne systems.
NSW: The Culgoa, Castlereagh, Namoi, Gwydir, Dumaresq / Severn / Macintyre systems.
Rainfall totals of 50 – 100mm will likely result in minor to moderate flooding. Rainfall totals of 100-200mm will likely result in MAJOR flooding. Thunderstorm Flash flooding is also an increased risk throughout these areas. Above average rainfall is forecast during the next 3 to 6 months so stakeholders need to be vigilant of future flooding. When heavy rainfall is forecast and occurs any flood preparations will need to be made a priority.
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