Northern Rivers 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
2
low
3
4
5
med
6
low
7
med
8
low
9
med
10
high
11
12
med
13
med
14
med
15
med
16
med
17
med
18
med
19
med
20
med
21
med
22
low
23
low
24
med
25
26
med
27
med
28
high
29
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 five main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, eastern Australia, the southeast 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 13 November to 17 November, 17 November to 21 November, and 27 November to 1 December. Rain events originating in the tropics and moving south are possible about 11 November to 15 November, 18 November to 22 November, and 22 November to 26 November.
Over Western Australia the strongest cold fronts should occur about 14 November to 18 November, 18 November to 22 November, and 28 November to 2 December.

Issued Oct 31

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

South-east Queensland hit by very dangerous thunderstorms as hail up to 14cm pummels the region

01:26 EDT

Hail up to 14 centimetres has been reported at Forestdale, south of Brisbane, as parts of south-east Queensland were pummelled by a series of very dangerous and "life threatening" thunderstorms this afternoon.

Hail hits Sydney with severe thunderstorm warnings in place for much of NSW

18:55 EDT

Hail has showered Sydney and parts of the NSW north coast as a dangerous low pressure system moves over the state through the night.