Darling Downs 28-day Rainfall Forecast

period
28-day
12-month

Sun

Mon

Tue

Wed

Thu

Fri

Sat

31
low

Aug 1
low

9
med

10
med

14
low

15
low

20
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 been relatively fast moving in recent weeks. There are six main troughs. Currently the most significant troughs are near the longitudes of South Africa, the southwest Indian Ocean, Western Australia, the south Pacific, and the Atlantic Ocean.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 4 August to 8 August, 12 August to 16 August, and 20 August to 24 August. Rain events originating in the tropics and moving south are possible about 3 August to 7 August, and 27 August to 31 August.
Over Western Australia the strongest cold fronts should occur about 29 July to 2 August, 12 August to 16 August, and 17 August to 21 August.

Issued Jul 25

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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