28 Day Rainfall Forecast
Riverina Rain Forecast
Riverina 28-day Rainfall Forecast
Sun Mon Tue Wed Thu Fri Sat27Low28Med29Hig30Med31LowFeb 1Med2Med3Low4Med5Med6789101112Low13141516171819202122Low23Low24MedCHANCE OF RAINFALL WITHIN DISTRICTNil< 25%Low25 - 50%Medium50 - 75%High≥ 75%
Issue NotesIssued 26 Jan 2021
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, eastern Australia, 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 3 February to 7 February, 18 February to 22 February, and 26 February to 2 March. Rain events originating in the tropics and moving south are possible about 11 February to 15 February. Over Western Australia the strongest cold fronts should occur about 3 February to 7 February, 22 February to 26 February, and 26 February to 2 March.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.