28 Day Rainfall Forecast
Southern Tablelands Rain Forecast
Southern Tablelands 28-day Rainfall Forecast
Sun Mon Tue Wed Thu Fri Sat2728Med2930Dec 1Low2Low3Low45Low6Low7Low8Low9Low10Low1112Low1314Med15Low1617Low18Low19Low20Low21Hig22Med23Med24Low25LowCHANCE OF RAINFALL WITHIN DISTRICTNil< 25%Low25 - 50%Medium50 - 75%High≥ 75%
Issue NotesIssued 26 Nov 2020
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, the Indian Ocean, New Zealand, 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 5 December to 9 December, 12 December to 16 December, and 20 December to 24 December. Rain events originating in the tropics and moving south are possible about 1 December to 5 December, 8 December to 12 December, and 14 December to 18 December. Over Western Australia the strongest cold fronts should occur about 5 December to 9 December, and 19 December to 23 December.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.