North East 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
13
med
14
high
15
med
16
med
17
med
18
high
19
high
20
low
21
low
22
high
23
med
24
med
25
high
26
high
27
low
28
low
29
low
30
low
31
med
Sep 1
med
2
low
3
med
4
high
5
high
6
med
7
med
8
high
9
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, 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 22 August to 26 August, 2 September to 6 September, and 12 September to 16 September. Rain events originating in the tropics and moving south are possible about 2 September to 6 September, 6 September to 10 September, and 15 September to 19 September.
Over Western Australia the strongest cold fronts should occur about 20 August to 24 August, 1 September to 5 September, and 9 September to 13 September.

Issued Aug 12

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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