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Alice Springs 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
18
19
low
20
med
21
low
22
23
low
24
25
26
27
28
29
med
30
med
Dec 1
low
2
low
3
low
4
med
5
low
6
low
7
low
8
low
9
low
10
low
11
12
13
14
15
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 six main troughs. Currently the most significant troughs are near the longitudes of South Africa, the southwest Indian Ocean, Western Australia, eastern Australia, the south Pacific, and the Atlantic Ocean.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 23 November to 27 November, 1 December to 5 December, and 9 December to 13 December. Rain events originating in the tropics and moving south are possible about 24 November to 28 November, 4 December to 8 December, and 9 December to 13 December.
Over Western Australia the strongest cold fronts should occur about 22 November to 26 November, 2 December to 6 December, and 6 December to 10 December.

Issued Nov 16

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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