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Northern Country 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
25
high
26
high
27
low
28
low
29
med
30
low
31
Aug 1
med
2
low
3
med
4
5
low
6
med
7
med
8
med
9
low
10
11
med
12
13
low
14
med
15
med
16
high
17
low
18
low
19
low
20
low
21
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 remained stable in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of 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 13 August to 17 August, 21 August to 25 August, and 26 August to 30 August. Rain events originating in the tropics and moving south are possible about 2 August to 6 August.
Over Western Australia the strongest cold fronts should occur about 9 August to 13 August, 14 August to 18 August, and 21 August to 25 August.

Issued Jul 24

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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