Darling Downs 28-day Rainfall Forecast

Sun

Mon

Tue

Wed

Thu

Fri

Sat

21
med

22
high

23
low

24
low

26
low

Jan 1
low

5
low

13
low

14
low

Chance of rainfall within district
nil < 25%	low 25% to 50%	med 50% to 75%	high ≥ 75%

Issue Notes

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 the Indian Ocean, eastern Australia, New Zealand, the southeast Pacific, and South America.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 24 December to 28 December, 9 January to 13 January, and 13 January to 17 January. Rain events originating in the tropics and moving south are possible about 22 December to 26 December.
Over Western Australia the strongest cold fronts should occur about 31 December to 4 January, and 8 January to 12 January.

Issued Dec 17

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.

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