28 Day Rainfall Forecast
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Southwest Rain Forecast
Southwest 28-day Rainfall ForecastSun Mon Tue Wed Thu Fri Sat 2930Jul 1234Hig5Med6Low7Low8Hig9Med10Low11Low1213Low14Med15Hig16Med17Med18Hig19Med20Med21Med22Low23Med2425Med26Med27MedCHANCE OF RAINFALL WITHIN DISTRICTNil< 25%Low25 - 50%Medium50 - 75%High≥ 75%Issue Notes
Issued 29 Jun 2022The 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 Indian Ocean, Western Australia, the south Pacific, and the southeast Pacific.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 9 July to 13 July, 21 July to 25 July, and 2 August to 6 August. Rain events originating in the tropics and moving south are possible about 5 July to 9 July, 26 July to 30 July, and 31 July to 4 August. Over Western Australia the strongest cold fronts should occur about 17 July to 21 July, 21 July to 25 July, and 2 August to 6 August.
Forecast ExplanationThis 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.
