Central Wheatbelt 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
31
med
Aug 1
high
2
3
4
5
6
7
8
low
9
med
10
med
11
12
low
13
med
14
15
low
16
low
17
low
18
19
20
low
21
low
22
23
24
25
26
low
27
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 slow moving in recent weeks. There are four main troughs. Currently the most significant troughs are near the longitudes of the Indian Ocean, New Zealand, 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 9 August to 13 August, 21 August to 25 August, and 31 August to 4 September. Rain events originating in the tropics and moving south are possible about 10 August to 14 August, and 21 August to 25 August.
Over Western Australia the strongest cold fronts should occur about 4 August to 8 August, 9 August to 13 August, and 31 August to 4 September.

Issued Jul 30

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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