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2:10am 11/05/2026 to 2:10am 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
10m
1.2 mm
1:10am 12/05/2026
1:20am 12/05/2026
1 in 1 years
100.0 %
20m
2.0 mm
1:10am 12/05/2026
1:30am 12/05/2026
1 in 1 years
100.0 %
30m
2.4 mm
1:10am 12/05/2026
1:40am 12/05/2026
1 in 1 years
100.0 %
60m
3.0 mm
12:40am 12/05/2026
1:40am 12/05/2026
1 in 1 years
100.0 %
90m
3.4 mm
12:00am 12/05/2026
1:30am 12/05/2026
1 in 1 years
100.0 %
120m
4.0 mm
12:00am 12/05/2026
2:00am 12/05/2026
1 in 1 years
100.0 %
3h
4.2 mm
11:30pm 11/05/2026
2:30am 12/05/2026
1 in 1 years
100.0 %
4h
5.2 mm
1:40pm 12/05/2026
6:10pm 12/05/2026
1 in 1 years
100.0 %
6h
5.6 mm
12:10pm 12/05/2026
6:10pm 12/05/2026
1 in 1 years
100.0 %
9h
5.6 mm
9:10am 12/05/2026
6:10pm 12/05/2026
1 in 1 years
100.0 %
12h
5.8 mm
12:10pm 12/05/2026
12:10am 13/05/2026
1 in 1 years
100.0 %
18h
9.4 mm
12:10am 12/05/2026
6:10pm 12/05/2026
1 in 1 years
100.0 %
24h
9.8 mm
6:10pm 11/05/2026
6:10pm 12/05/2026
1 in 1 years
100.0 %
30h
10.2 mm
7:20pm 11/05/2026
1:20am 13/05/2026
1 in 1 years
100.0 %
36h
10.2 mm
1:20pm 11/05/2026
1:20am 13/05/2026
1 in 1 years
100.0 %
48h
10.2 mm
2:10am 11/05/2026
2:10am 13/05/2026
1 in 1 years
100.0 %
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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