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East Gippsland 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
21
high
22
high
23
high
24
high
25
med
26
high
27
low
28
29
low
30
med
31
low
Jun 1
med
2
low
3
4
med
5
low
6
low
7
med
8
med
9
med
10
low
11
low
12
low
13
14
med
15
low
16
high
17
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 seven main troughs. Currently the most significant troughs are near the longitudes of South Africa, the southwest Indian Ocean, Western Australia, New Zealand, the south Pacific, South America, and the Atlantic Ocean.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 4 June to 8 June, 13 June to 17 June, and 18 June to 22 June. Rain events originating in the tropics and moving south are possible about 26 May to 30 May, 10 June to 14 June, and 20 June to 24 June.
Over Western Australia the strongest cold fronts should occur about 30 May to 3 June, 4 June to 8 June, and 19 June to 23 June.

Issued May 20

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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