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East Coast 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
7
8
9
low
10
11
med
12
13
low
14
low
15
16
low
17
low
18
low
19
med
20
low
21
22
23
med
24
low
25
med
26
med
27
low
28
med
29
low
Mar 1
2
low
3
med
4
5
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 the southwest Indian Ocean, Western Australia, eastern Australia, the southeast Pacific, and the Atlantic Ocean.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 13 February to 17 February, 2 March to 6 March, and 9 March to 13 March. Rain events originating in the tropics and moving south are possible about 16 February to 20 February, 23 February to 27 February, and 29 February to 4 March.
Over Western Australia the strongest cold fronts should occur about 14 February to 18 February, 2 March to 6 March, and 10 March to 14 March.

Issued Feb 6

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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