Weather

Maranoa 28-day rainfall forecast

Sun Mon Tue Wed Thu Fri Sat
    20
 
 
21
 
 
22
 
 
23
 
 
24
 
 
25
 
 
26
 
 
27
 
 
28
 
 
29
Low
 
30
 
 
31
 
 
1
Low
Sep
2
 
 
3
 
 
4
 
 
5
 
 
6
 
 
7
 
 
8
Low
 
9
 
 
10
 
 
11
 
 
12
 
 
13
 
 
14
 
 
15
 
 
16
 
 
         

Chance of rainfall somewhere within district

Nil
<25%
Low
25-50%
Medium
50-75%
High
≥75%

Issue Notes

Issued 19 Aug 2019

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 southwest Indian Ocean, New Zealand, and the southeast Pacific. Summary: Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 28 August to 1 September, 1 September to 5 September, and 18 September to 22 September. Rain events originating in the tropics and moving south are possible about 17 August to 21 August. Over Western Australia the strongest cold fronts should occur about 26 August to 30 August, 7 September to 11 September, and 18 September to 22 September.

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.