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Hunter 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
30
low
31
Sep 1
2
high
3
high
4
high
5
med
6
high
7
low
8
high
9
low
10
11
12
13
14
low
15
low
16
low
17
low
18
19
med
20
21
22
low
23
low
24
med
25
med
26
med
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 the Indian Ocean, New Zealand, the south Pacific, the southeast 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 15 September to 19 September, 19 September to 23 September, and 30 September to 4 October. Rain events originating in the tropics and moving south are possible about 27 August to 31 August.
Over Western Australia the strongest cold fronts should occur about 15 September to 19 September, 25 September to 29 September, and 30 September to 4 October.

Issued Aug 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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