28 Day Rainfall Forecast
Adelaide Rain Forecast
Adelaide 28-day Rainfall Forecast
Sun Mon Tue Wed Thu Fri Sat27Low28Med29Hig30LowOct 12Med34Med5Med6Low7Low8910Low11Low1213Low141516Low17Low18Low19Low20212223Med2425CHANCE OF RAINFALL WITHIN DISTRICTNil< 25%Low25 - 50%Medium50 - 75%High≥ 75%
Issue NotesIssued 26 Sep 2020
The hemispheric long wave pattern has remained stable in recent weeks. There are four main troughs. Currently the most significant troughs are near the longitudes of the southwest Indian Ocean, the Indian Ocean, Western Australia, and the Atlantic Ocean.
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 3 October to 7 October, 14 October to 18 October, and 21 October to 25 October. Rain events originating in the tropics and moving south are possible about 9 October to 13 October. Over Western Australia the strongest cold fronts should occur about 3 October to 7 October, 14 October to 18 October, and 25 October to 29 October.Forecast Explanation
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.