28 Day Rainfall Forecast
Riverland Rain Forecast
Riverland 28-day Rainfall Forecast
Sun Mon Tue Wed Thu Fri SatDec 12345678910Med11Med12Low13Low1415161718Low19Low20Med212223Low24Low252627Low2829CHANCE OF RAINFALL WITHIN DISTRICTNil< 25%Low25 - 50%Medium50 - 75%High≥ 75%
Issue NotesIssued 1 Dec 2021
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, Western Australia, eastern Australia, the southeast Pacific, South America, and the Atlantic Ocean.
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 9 December to 13 December, 15 December to 19 December, and 1 January to 5 January. Rain events originating in the tropics and moving south are possible about 6 December to 10 December, 24 December to 28 December, and 31 December to 4 January. Over Western Australia the strongest cold fronts should occur about 9 December to 13 December, 22 December to 26 December, and 30 December to 3 January.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.