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North Central 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
25
26
med
27
high
28
high
29
med
30
med
31
low
Jun 1
low
2
3
4
5
6
low
7
low
8
med
9
med
10
med
11
12
low
13
low
14
med
15
med
16
med
17
med
18
high
19
high
20
med
21
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 five main troughs. Currently the most significant troughs are near the longitudes of South Africa, the southwest Indian Ocean, eastern Australia, the south Pacific, and South America.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 31 May to 4 June, 12 June to 16 June, and 25 June to 29 June. Rain events originating in the tropics and moving south are possible about 14 June to 18 June, and 25 June to 29 June.
Over Western Australia the strongest cold fronts should occur about 31 May to 4 June, 15 June to 19 June, and 25 June to 29 June.

Issued May 23

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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