Central West 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
15
16
17
18
19
20
21
22
23
24
25
low
26
low
27
low
28
low
29
low
30
May 1
2
3
4
med
5
low
6
med
7
low
8
low
9
10
11
12
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 southwest Indian Ocean, the Indian Ocean, eastern Australia, the south Pacific, and the southeast Pacific.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 23 April to 27 April, 11 May to 15 May, and 15 May to 19 May. Rain events originating in the tropics and moving south are possible about 4 May to 8 May.
Over Western Australia the strongest cold fronts should occur about 23 April to 27 April, 29 April to 3 May, and 13 May to 17 May.

Issued Apr 13

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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