28 Day Rainfall Forecast
Northern Country Rain Forecast
Northern Country 28-day Rainfall Forecast
Sun Mon Tue Wed Thu Fri Sat4567891011Low12Low13Low141516Low17Low1819Med20Med21Low22Low2324252627Low28Low29Low30Low31Aug 1LowCHANCE OF RAINFALL WITHIN DISTRICTNil< 25%Low25 - 50%Medium50 - 75%High≥ 75%
Issue NotesIssued 3 Jul 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 South Africa, the Indian Ocean, New Zealand, and the southeast Pacific.
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 9 July to 13 July, 26 July to 30 July, and 30 July to 3 August. Rain events originating in the tropics and moving south are possible about 13 July to 17 July, 26 July to 30 July, and 6 August to 10 August. Over Western Australia the strongest cold fronts should occur about 10 July to 14 July, 17 July to 21 July, and 31 July to 4 August.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.