Perth 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
24
25
26
27
28
29
30
31
Feb 1
med
2
high
3
low
4
low
5
6
low
7
low
8
low
9
10
11
low
12
low
13
low
14
low
15
16
17
18
low
19
low
20
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 seven main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, eastern Australia, the south 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 30 January to 3 February, 13 February to 17 February, and 21 February to 25 February. Rain events originating in the tropics and moving south are possible about 30 January to 3 February.
Over Western Australia the strongest cold fronts should occur about 29 January to 2 February, 13 February to 17 February, and 21 February to 25 February.

Issued Jan 22

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

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Just days after some of the worst bushfires ever seen in Australia, the Bureau of Meteorology tweeted on January 8 that a climate driver called the Indian Ocean Dipole had returned to neutral.

Wet-season storms drop 'best rain in years' across Territory cattle country

06:12 EDT

Wet-season storms have delivered much-needed rain across Northern Territory cattle country, with drought-affected Barkly producers among those to benefit from the downpour.

BOM forecasts Sydney to hit 41C as NSW braces for hot weather and bushfire flare ups

05:30 EDT

NSW is set for a day of wild weather with scorching temperatures, dust storms, damaging winds and the risk of bushfires reigniting after a week of rain.