Central North 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
22
high
23
med
24
med
25
high
26
high
27
low
28
med
29
med
30
low
31
low
Aug 1
2
med
3
med
4
5
6
med
7
high
8
low
9
low
10
med
11
high
12
med
13
low
14
low
15
med
16
low
17
low
18
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 remained stable in recent weeks. There are three main troughs. Currently the most significant troughs are near the longitudes of the Indian Ocean, Western Australia, and the southeast Pacific.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 5 August to 9 August, 13 August to 17 August, and 21 August to 25 August. Rain events originating in the tropics and moving south are possible about 11 August to 15 August, and 19 August to 23 August.
Over Western Australia the strongest cold fronts should occur about 26 July to 30 July, 5 August to 9 August, and 14 August to 18 August.

Issued Jul 21

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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