20/10/2026
⚠️🌧️ A WEEK OF RAIN, FLOOD RISK
- NORTHERN
- Posted: 6:29pm, Tuesday 20 October
Persistent and heavy rain will affect parts of NSW during at least the next seven days, with some areas possibly in line to receive more than one month’s rain in a matter of days.
Two separate streams of moisture-laden air will collide over eastern Australia in the coming week. One will come from winds in the middle to upper levels of the atmosphere carrying moisture across Australia from the Indian Ocean. Meanwhile, in the lower atmosphere closer to the surface, winds will flow towards Australia from the Coral and Tasman Seas, providing a secondary source of moisture above eastern Australia.
In addition to this abundance of moisture, a series of upper-level troughs will provide ample atmospheric instability over parts of Queensland and NSW in the coming week. This will create an ideal environment for rain and thunderstorm development.
It is important to note that there is a high amount of model uncertainty regarding how much rain will fall over the next week and exactly where the heaviest falls will occur. There is good consensus that the northeast part of the state will receive heavy rainfall, possibly more than 100mm in the coming week, which would exceed the October average for some locations.
While rain is likely to fall over parts of NSW each day between now and at least next Wednesday, periods of heavier rain are possible, including this Thursday when heavier falls are expected to develop over northeast NSW.
The coming week’s rain and thunderstorms may cause both flash and riverine flooding. Be sure to check the latest severe weather, severe thunderstorm and flood warnings in your area for the most up to date information. We will continue to provide updates as the week progresses.
If you require emergency help, call the NSW SES on 132 500 and if life-threatening, call 000 (Triple Zero). www.ses.nsw.gov.au
▪️View and be alerted to more incidents near you by downloading the NSW Incident Alerts App. Try for free today; https://apple.co/39Y5tW2
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▪️Accumulated rainfall over the next 7 days (ECMWF)
▪️Source: Weatherzone (weatherzone.com)