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Sydney 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
30
31
Aug 1
low
2
med
3
low
4
low
5
6
7
8
9
med
10
11
low
12
low
13
med
14
med
15
16
low
17
low
18
low
19
low
20
21
22
23
low
24
med
25
med
26
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 Indian Ocean, eastern Australia, the southeast Pacific, and South America.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 8 August to 12 August, 20 August to 24 August, and 26 August to 30 August. Rain events originating in the tropics and moving south are possible about 18 August to 22 August.
Over Western Australia the strongest cold fronts should occur about 13 August to 17 August, 22 August to 26 August, and 28 August to 1 September.

Issued Jul 28

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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Little town raises big money for drought support

ABC image 16:38 EST Organisers of the Mulga Bill Quick Shear at Yeoval, in Central West New South Wales on the weekend, were a bit nervous about the weather on Saturday morning; there'd been good rain on Friday night and they didn't have a 'Plan B' if things didn't clear up.

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