Central Highlands 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
24
med
25
med
26
med
27
med
28
med
29
low
30
low
31
med
Nov 1
low
2
low
3
med
4
low
5
med
6
high
7
high
8
high
9
med
10
med
11
med
12
med
13
14
15
16
low
17
low
18
low
19
low
20
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 South America.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 31 October to 4 November, 10 November to 14 November, and 20 November to 24 November. Rain events originating in the tropics and moving south are possible about 28 October to 1 November, 3 November to 7 November, and 7 November to 11 November.
Over Western Australia the strongest cold fronts should occur about 31 October to 4 November, 10 November to 14 November, and 21 November to 25 November.

Issued Oct 23

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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