Central Coast 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
19
high
20
low
21
low
22
med
23
high
24
high
25
med
26
high
27
med
28
low
29
30
May 1
2
3
low
4
low
5
6
low
7
low
8
low
9
med
10
med
11
med
12
low
13
low
14
15
16
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, New Zealand, 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 4 May to 8 May, 10 May to 14 May, and 22 May to 26 May. Rain events originating in the tropics and moving south are possible about 1 May to 5 May.
Over Western Australia the strongest cold fronts should occur about 5 May to 9 May, 10 May to 14 May, and 22 May to 26 May.

Issued Apr 18

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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