Southern Tablelands 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
28
29
30
low
31
low
Jun 1
med
2
low
3
low
4
5
6
7
8
9
low
10
11
med
12
med
13
14
low
15
med
16
med
17
low
18
low
19
low
20
21
low
22
23
med
24
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 six main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, eastern Australia, the south Pacific, South America, and the Atlantic Ocean.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 31 May to 4 June, 15 June to 19 June, and 24 June to 28 June. Rain events originating in the tropics and moving south are possible about 9 June to 13 June.
Over Western Australia the strongest cold fronts should occur about 31 May to 4 June, 13 June to 17 June, and 25 June to 29 June.

Issued May 26

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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