Northern Country 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
7
8
9
low
10
med
11
med
12
med
13
low
14
15
16
17
18
19
low
20
low
21
low
22
low
23
24
med
25
low
26
low
27
28
low
29
low
30
31
Aug 1
low
2
med
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 six main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, the south Pacific, 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 22 July to 26 July, 1 August to 5 August, and 9 August to 13 August. Rain events originating in the tropics and moving south are possible about 11 July to 15 July, 27 July to 31 July, and 31 July to 4 August.
Over Western Australia the strongest cold fronts should occur about 22 July to 26 July, 26 July to 30 July, and 1 August to 5 August.

Issued Jul 6

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

Stormy night in Perth

10:39 EST

Thunderstorms caused more than 50,000 lightning strikes within a 100 kilometre radius of Perth on Sunday evening.

Thunderstorms closing in on southwest WA

14:54 EST

A low-pressure system, accompanied by a front and troughs, is currently impacting southwestern parts of Western Australia, bringing rain, wind, and storms.