Central North 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
7
med
8
low
9
high
10
high
11
high
12
high
13
med
14
high
15
med
16
17
low
18
high
19
med
20
med
21
med
22
low
23
med
24
med
25
med
26
med
27
low
28
med
29
med
30
low
31
low
Sep 1
med
2
med
3
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 South Africa, the southwest Indian Ocean, the Indian Ocean, Western 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 16 August to 20 August, 21 August to 25 August, and 30 August to 3 September. Rain events originating in the tropics and moving south are possible about 13 August to 17 August, 23 August to 27 August, and 30 August to 3 September.
Over Western Australia the strongest cold fronts should occur about 10 August to 14 August, 16 August to 20 August, and 23 August to 27 August.

Issued Aug 5

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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