Upper South East 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
28
low
29
high
30
high
Oct 1
2
3
low
4
low
5
6
low
7
med
8
med
9
med
10
med
11
med
12
13
med
14
low
15
low
16
low
17
med
18
19
20
med
21
low
22
23
24
low
25
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 been relatively fast moving in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of the Indian Ocean, Western Australia, New Zealand, the southeast 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 7 October to 11 October, 18 October to 22 October, and 28 October to 1 November. Rain events originating in the tropics and moving south are possible about 2 October to 6 October, 8 October to 12 October, and 12 October to 16 October.
Over Western Australia the strongest cold fronts should occur about 6 October to 10 October, 18 October to 22 October, and 28 October to 1 November.

Issued Sep 27

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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Weather News

Today looks like the last decent day, so here's our 2021 snow season wrap

10:23 EST

The 2021 season snow is not dead quite yet, with lifts still spinning at four resorts – Mt Buller, Falls Creek and Mt Hotham in Victoria, plus Perisher in NSW – but the weather this week will turn ugly from a snow perspective, with several days of rain from about Tuesday onwards.

More rain for southern WA

15:18 EST

A low pressure system is generating a series of cold fronts that are likely to affect WA later this week.

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