Arnhem 28-day Rainfall Forecast

period
28-day
12-month

Sun

Mon

Tue

Wed

Thu

Fri

Sat

11
high

12
high

13
high

14
high

15
high

16
high

17
high

18
high

19
high

20
high

21
high

22
high

23
high

24
high

25
high

26
high

27
high

28
high

29
high

Mar 1
high

2
high

3
high

4
high

5
high

6
high

7
high

8
low

9
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 five main troughs. Currently the most significant troughs are near the longitudes of the southwest Indian Ocean, Western Australia, New Zealand, 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 4 March to 8 March, 9 March to 13 March, and 14 March to 18 March. Rain events originating in the tropics and moving south are possible about 21 February to 25 February, 2 March to 6 March, and 13 March to 17 March.
Over Western Australia the strongest cold fronts should occur about 21 February to 25 February, 29 February to 4 March, and 4 March to 8 March.

Issued Feb 9

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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Queanbeyan flood watch cancelled

Audience submitted image 12:35 EDT A flood watch for Queanbeyan and Molonglo valleys has been cancelled but severe thunderstorms are still being forecast.