ACT 28-day Rainfall Forecast

Sun

Mon

Tue

Wed

Thu

Fri

Sat

2
low

3
low

9
low

13
low

15
med

16
med

17
low

18
low

19
low

20
low

22
med

23
med

24
low

27
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 four main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, New Zealand, and the southeast Pacific.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 12 June to 16 June, 24 June to 28 June, and 29 June to 3 July. Rain events originating in the tropics and moving south are possible about 13 June to 17 June, 19 June to 23 June, and 4 July to 8 July.
Over Western Australia the strongest cold fronts should occur about 13 June to 17 June, 20 June to 24 June, and 28 June to 2 July.

Issued Jun 1

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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