Illawarra 28-day Rainfall Forecast

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

Issued Dec 5

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.

Site search


Enter a postcode or town name for local weather, or text to search the site. » advanced search

Help with Farmonline Weather