East Coast 28-day Rainfall Forecast
med
high
med
high
high
high
low
low
low
low
low
low
med
med
low
high
med
low
low
med
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 four main troughs. Currently the most significant troughs are near the longitudes of the southwest Indian Ocean, eastern Australia, 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 22 May to 26 May, 26 May to 30 May, and 3 June to 7 June. Rain events originating in the tropics and moving south are possible about 5 June to 9 June, and 9 June to 13 June.
Over Western Australia the strongest cold fronts should occur about 23 May to 27 May, 27 May to 31 May, and 31 May to 4 June.
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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Weather News
Icy weather looms for Tasmania
13:24 EST
A flurry of cold fronts is about to send surges of wintry weather across Tasmania, resulting in blustery showers and low-level snow.
Trio of lows churning the Tasman Sea
10:36 EST
If you live along the southern half of the NSW coast, it's probably worth staying out of the water today.
