NSW, ACT & VIC 1 Month Outlook

Issued December 3rd 2022: The La Nina weather pattern coupling with a continued negative Indian Ocean Dipole is expected to continue to produce not just ample moisture for repetitive rain events across NSW, VIC & ACT during the month of December – but also additional heat which naturally occurs during the Summer months, will become favourable for increased storm activity during December. Most models are agreeing that average to above average rainfall is expected over most of the ACT, VIC & NSW – with the highest actual accumulations forecast across NENSW. Widespread falls of 100mm+ are expected over the month across the ACT, Eastern half of VIC and areas along and East of the Ranges through Eastern NSW. Actual flood events will be hit and miss, as they will be based purely on how much can fall over large catchment areas in a short period of time… but in saying that, we are entering the month with numerous rivers and creeks across these State that are already exceeding minor/moderate (and in some cases, major) flood levels.

Please refer to our DAILY forecasts for specific rain, storm and flood risk maps.

Issued 3rd December 2022: Widespread below average temperatures are expected across the majority of NSW, ACT & Eastern VIC during December. This is largely due to monthly averages being noticeably warmer compared to previous months along with a continued negative IOD and La Nina pattern increasing moisture over these areas which is diluting a lot of the heat in the atmosphere, as well as producing several rounds of rain and storms over the month which all also keep temperatures down. Heatwaves will still naturally occur in between rain and storm events – however we anticipate the heaters to have less bite to them compared to previous years, as well as being shorter lived – which will tend to result in the balance between warm and coo,, swaying more towards the cool side of things.