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Central 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
28
low
29
high
30
med
31
high
Apr 1
med
2
low
3
4
5
low
6
low
7
high
8
med
9
low
10
med
11
high
12
med
13
high
14
med
15
high
16
med
17
low
18
19
med
20
low
21
low
22
med
23
med
24
med
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 three main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, Western Australia, and the south Pacific.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 14 April to 18 April, 20 April to 24 April, and 28 April to 2 May. Rain events originating in the tropics and moving south are possible about 25 March to 29 March.
Over Western Australia the strongest cold fronts should occur about 7 April to 11 April, 20 April to 24 April, and 28 April to 2 May.

Issued Mar 27

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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