Brisbane 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
31
med
Feb 1
low
2
3
med
4
high
5
med
6
7
low
8
med
9
med
10
med
11
med
12
high
13
med
14
low
15
low
16
17
18
low
19
low
20
21
22
23
low
24
25
26
27
low
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 seven main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, Western Australia, 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 7 February to 11 February, 19 February to 23 February, and 2 March to 6 March. Rain events originating in the tropics and moving south are possible about 7 February to 11 February, 25 February to 29 February, and 29 February to 4 March.
Over Western Australia the strongest cold fronts should occur about 5 February to 9 February, and 14 February to 18 February.

Issued Jan 29

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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