Interior 28-day Rainfall Forecast
|Chance of rainfall within district|
25% to 50%
50% to 75%
The hemispheric long wave pattern has been relatively fast moving in recent weeks. There are four main troughs. Currently the most significant troughs are near the longitudes of the southwest Indian Ocean, Western Australia, New Zealand, and South America.
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 12 September to 16 September, 25 September to 29 September, and 30 September to 4 October. Rain events originating in the tropics and moving south are possible about 14 September to 18 September, 21 September to 25 September, and 27 September to 1 October.
Over Western Australia the strongest cold fronts should occur about 12 September to 16 September, 24 September to 28 September, and 5 October to 9 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.
Southern parts of Western Australia are due for some warm weather after a cool start to the season.
Large portions of the east were shrouded in a foggy blanket in the early hours of the morning.
Tasmanian ski resorts at Ben Lomond and Mount Mawson are looking back at one of their best seasons in at least a decade.