|Chance of rainfall within district|
25% to 50%
50% to 75%
The hemispheric long wave pattern has remained stable in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, New Zealand, the south Pacific, and South America.
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 26 September to 30 September, 6 October to 10 October, and 14 October to 18 October. Rain events originating in the tropics and moving south are possible about 28 September to 2 October, 9 October to 13 October, and 15 October to 19 October.
Over Western Australia the strongest cold fronts should occur about 6 October to 10 October, 14 October to 18 October, and 18 October to 22 October.
This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.
The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.
In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.
11:27 EST Darwin sweltered through its second hottest September day on record yesterday, with another stinker on the cards again today.