Fairfax Media Network

Darling Downs 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
20
21
22
23
low
24
low
25
med
26
med
27
med
28
med
29
low
30
low
31
med
Feb 1
med
2
3
4
low
5
med
6
low
7
8
9
10
11
12
13
14
low
15
low
16
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 South Africa, the Indian Ocean, Western 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 2 February to 6 February, 6 February to 10 February, and 15 February to 19 February. Rain events originating in the tropics and moving south are possible about 24 January to 28 January, 28 January to 1 February, and 1 February to 5 February.
Over Western Australia the strongest cold fronts should occur about 27 January to 31 January, 7 February to 11 February, and 21 February to 25 February.

Issued Jan 18

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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