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8:45pm 11/05/2026 to 8:45pm 13/05/2026
You can find out more about Design Rainfall and IFD here.
Observations for this analysis :
Maximum observed rainfall by duration, estimated return period and AEP
Duration
Rainfall
Start
End
Years
AEP
15m
19.0 mm
8:00pm 13/05/2026
8:15pm 13/05/2026
1 in 1.3 years
79.13 %
30m
25.0 mm
8:00pm 13/05/2026
8:30pm 13/05/2026
1 in 1.2 years
85.52 %
45m
33.0 mm
8:00pm 13/05/2026
8:45pm 13/05/2026
1 in 1.4 years
73.23 %
60m
33.0 mm
7:15pm 13/05/2026
8:15pm 13/05/2026
1 in 1.2 years
83.54 %
90m
47.0 mm
7:15pm 13/05/2026
8:45pm 13/05/2026
1 in 1.5 years
64.65 %
120m
48.0 mm
6:45pm 13/05/2026
8:45pm 13/05/2026
1 in 1.4 years
71.04 %
3h
53.0 mm
5:45pm 13/05/2026
8:45pm 13/05/2026
1 in 1.3 years
74.36 %
4h
53.0 mm
4:15pm 13/05/2026
8:45pm 13/05/2026
1 in 1.2 years
86.7 %
6h
53.0 mm
2:45pm 13/05/2026
8:45pm 13/05/2026
1 in 1.1 years
91.08 %
9h
53.0 mm
11:45am 13/05/2026
8:45pm 13/05/2026
1 in 1.0 years
96.22 %
12h
53.0 mm
8:45am 13/05/2026
8:45pm 13/05/2026
1 in 1.0 years
98.24 %
18h
56.0 mm
2:45am 13/05/2026
8:45pm 13/05/2026
1 in 1.0 years
98.87 %
24h
69.0 mm
8:45pm 12/05/2026
8:45pm 13/05/2026
1 in 1.0 years
98.26 %
30h
74.0 mm
2:45pm 12/05/2026
8:45pm 13/05/2026
1 in 1.0 years
98.35 %
36h
74.0 mm
8:45am 12/05/2026
8:45pm 13/05/2026
1 in 1.0 years
98.76 %
Note: A '1 in 1.0 years' estimate means that it is almost certain to occur at least once in a year, and could occur much more than once per year on average. For smaller values like this the Annual Recurrance Interval (ARI) may be of more relevance, but it is complex to calculate for common events.
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