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Murraylands 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
28
high
29
high
30
low
Oct 1
low
2
high
3
med
4
high
5
low
6
7
med
8
low
9
med
10
low
11
low
12
low
13
med
14
15
med
16
med
17
med
18
low
19
low
20
21
low
22
low
23
high
24
high
25
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 five main troughs. Currently the most significant troughs are near the longitudes of the Indian Ocean, Western Australia, New Zealand, 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 2 October to 6 October, 22 October to 26 October, and 30 October to 3 November. Rain events originating in the tropics and moving south are possible about 8 October to 12 October, 14 October to 18 October, and 23 October to 27 October.
Over Western Australia the strongest cold fronts should occur about 2 October to 6 October, 7 October to 11 October, and 11 October to 15 October.

Issued Sep 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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