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Southern Tablelands 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
4
5
low
6
med
7
med
8
low
9
low
10
med
11
12
low
13
14
15
16
17
low
18
low
19
med
20
med
21
22
23
low
24
low
25
med
26
med
27
low
28
29
30
low
Oct 1
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 four main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, 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 11 September to 15 September, 16 September to 20 September, and 29 September to 3 October. Rain events originating in the tropics and moving south are possible about 31 August to 4 September.
Over Western Australia the strongest cold fronts should occur about 11 September to 15 September, 16 September to 20 September, and 29 September to 3 October.

Issued Sep 2

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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